Screen flashing and freezing

I have a 2008 Mac Pro, which has served me well since I got it, at least until a day or two ago. At that time, it started exhibiting sporadic black flickering on screen, paired with freezing. At first, everything would freeze except the audio, which would continue playing uninterrupted, and after a minute or so the system would unfreeze like nothing happened. Now, though, it seems to have gotten worse; the system doesn't seem to recover after a flickering episode, and even the audio will get stuck into a one second loop after a while.
I tried resetting the PRAM and the SMC. When that didn't work, I tried restarting into Lion Recovery mode with Command-R. For some reason, that sent me right to a reinstall screen, but it didn't matter, because the screen started flickering and the system froze almost immediately after startup. I'm pretty sure that what it froze in was a separate recovery partition, so that should rule out any software issue. I'm guessing that my video card is fried, but I'd like to see what others think; I'd like to avoid buying a video card that I don't need.

2009 Mac Pro 3,1, GeForce 8800GT, 6GB ram.
I have recently had the same problems. Screen flickering, tiling and freezing previous to this video settings I've had for a long time just changed. I am not sure if it is my monitor or graphics card. My graphics card was replaced once already. This is acting a little different this time.
I also reset pram am still running 10.6.8

Similar Messages

My Mac glitches after startup with screen flashing and freezing up.

Why does my Mac begin to flash then freeze after start up?

Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
Any change?
Have you blown the dust out lately?

MBP screen flashes and freezes; not recognizing HD?

Earlier today my Macbook Pro froze up and the screen filled with these vertical columns of short, squiggly lines. I couldn't do anything with it so I used the power button to power down and when I started up I got the message saying I need to restart the computer, which I kept doing and it made no difference. I did some research and found of this is called a kernel panic and I did a few things suggested to someone in another post: resetting pram, using fsck (it worked for a little while after I did that), booting from the OS disc and verifying the disk. The thing that worked best and consistently was booting from the OS disc, going to startup and selecting "Macintosh HD." Once I did that it let me log on, although I couldn't do much before I got the message again. Currently, the only way I can get into my computer is to use the disk and select my HD.
When this started I was using the Rosetta Stone 3 program, which I'd just updated. I'm guessing this might be the problem, or maybe it's just a coincidence. I believe I read somewhere that an update may cause this. Is there anything else that can be done? This came at the worst time, just before I planned to start using Time Machine.
Does anyone have any idea what could be causing this, or what I can do? It's under AppleCare, but I'm hoping there's something I can do short of getting something replaced.

Thanks for the link. I'll have to look for the Apple Hardware disk after I get home.
There's a log from 9 o'clock this morning, when my computer wasn't even on and before I was up. Does that mean there was already a problem? Here's that one:
+Mon Jun 15 09:14:52 2009+
+panic(cpu 0 caller 0x001AB0FE): Kernel trap at 0x00c56bbd, type 14=page fault, registers:+
+CR0: 0x8001003b, CR2: 0x000000bc, CR3: 0x0159e000, CR4: 0x00000660+
+EAX: 0x34a45630, EBX: 0x04d23004, ECX: 0x04ee0800, EDX: 0x00000000+
+CR2: 0x000000bc, EBP: 0x34a45668, ESI: 0x00000000, EDI: 0xffffffff+
+EFL: 0x00010246, EIP: 0x00c56bbd, CS: 0x00000008, DS: 0x04ee0010+
+Error code: 0x00000000+
+Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)+
+0x34a45408 : 0x12b4c6 (0x45ec20 0x34a4543c 0x13355c 0x0)+
+0x34a45458 : 0x1ab0fe (0x468ecc 0xc56bbd 0xe 0x468678)+
+0x34a45538 : 0x1a1703 (0x34a45550 0x9 0x34a45668 0xc56bbd)+
+0x34a45548 : 0xc56bbd (0xe 0x48 0x34a40010 0xc80010)+
+0x34a45668 : 0xc5eb49 (0xc1d0000d 0x1000000 0x1000003 0x40)+
+0x34a456c8 : 0xc5122e (0x34a45858 0x6 0x0 0x0)+
+0x34a45828 : 0xc423e2 (0x0 0x600d600d 0x7027 0x34a45858)+
+0x34a458e8 : 0xe2ff7e (0xc1d0000d 0x1000000 0x1000003 0x40)+
+0x34a45918 : 0xe3b6dc (0x2443d000 0x1000000 0x88100090 0x3e)+
+0x34a478a8 : 0xe17047 (0x2443d000 0x1000000 0x15 0x2443d01c)+
+0x34a479a8 : 0xc3db09 (0x2443d000 0x0 0x34a47ab2 0x80)+
+0x34a47a08 : 0xc3269d (0x4a2f000 0x0 0x34a47ab2 0x80)+
+0x34a47b38 : 0xc33f44 (0x4a2f000 0xc3762c 0x34a47bec 0x4)+
+0x34a47c08 : 0xbafc18 (0x4a2f000 0x1 0x0 0x13)+
+0x34a47c68 : 0xba8be6 (0x4a2f000 0x34a47d2c 0x4d042f0 0x4a2f000)+
+0x34a47c98 : 0x415243 (0x4a2f000 0x4d042f0 0x4d042f0 0x0)+
+ Backtrace continues...+
+Kernel loadable modules in backtrace (with dependencies):+
com.apple.NVDAResman(5.4.4)@0xc3a000->0xe98fff
+dependency: com.apple.iokit.IONDRVSupport(1.7.3)@0xc2c000+
+dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5cd000+
+dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0xba0000+
com.apple.iokit.IONDRVSupport(1.7.3)@0xc2c000->0xc39fff
+dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5cd000+
+dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0xba0000+
com.apple.iokit.IOGraphicsFamily(1.7.3)@0xba0000->0xbbcfff
+dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5cd000+
+BSD process name corresponding to current thread: WindowServer+
+Mac OS version:+
9J61
+Kernel version:+
+Darwin Kernel Version 9.7.0: Tue Mar 31 22:52:17 PDT 2009; root:xnu-1228.12.14~1/RELEASE_I386+
+System model name: MacBookPro3,1 (Mac-F4238BC8)+
+System uptime in nanoseconds: 38081837945+
+unloaded kexts:+
(none)
+loaded kexts:+
+com.parallels.kext.prl_vnic 4.0 3810.351321+
+com.parallels.kext.prl_netbridge 4.0 3810.351321+
+com.parallels.kext.prl_hypervisor 4.0 3810.351321+
+com.parallels.kext.prlhidhook 4.0 3810.351321+
+com.parallels.kext.prlusbconnect 4.0 3810.351321+
+com.apple.filesystems.ntfs 2.1 - last loaded 37380977900+
+com.apple.driver.IOBluetoothBNEPDriver 2.1.6f8+
+com.apple.driver.InternalModemSupport 2.4.0+
+com.apple.filesystems.autofs 2.0.2+
+com.apple.driver.AppleHDAPlatformDriver 1.6.8a3+
+com.apple.iokit.IOBluetoothSerialManager 2.1.6f8+
+com.apple.driver.AppleUpstreamUserClient 2.7.5+
+com.apple.DontSteal_Mac_OSX 6.0.3+
+com.apple.iokit.CHUDUtils 200+
+com.apple.driver.AppleHDA 1.6.8a3+
+com.apple.iokit.CHUDProf 207+
+com.apple.GeForce 5.4.4+
+com.apple.iokit.IOFireWireIP 1.7.7+
+com.apple.driver.AppleGraphicsControl 2.8.11+
+com.apple.driver.AppleIRController 110+
+com.apple.nvidia.nv50hal 5.4.4+
+com.apple.driver.AirPort.Atheros 319.10.3+
+com.apple.driver.AppleHDAController 1.6.8a3+
+com.apple.driver.SMCMotionSensor 2.1.1d2+
+com.apple.driver.AudioIPCDriver 1.0.6+
+com.apple.kext.AppleSMCLMU 1.4.3d2+
+com.apple.driver.ACPISMCPlatformPlugin 3.4.0d10+
+com.apple.driver.AppleLPC 1.2.12+
+com.apple.driver.AppleBacklight 1.6.0+
+com.apple.driver.AppleTyMCEDriver 1.0.0d28+
+com.apple.driver.CSRUSBBluetoothHCIController 2.1.6f8+
+com.apple.driver.AppleUSBTrackpad 1.7.4f1+
+com.apple.driver.AppleUSBTCKeyEventDriver 1.7.4f1+
+com.apple.driver.AppleUSBTCKeyboard 1.7.4f1+
+com.apple.driver.CSRHIDTransitionDriver 2.1.6f8+
+com.apple.driver.AppleUSBMergeNub 3.4.3+
+com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.0.9+
+com.apple.iokit.SCSITaskUserClient 2.0.9+
+com.apple.driver.XsanFilter 2.7.91+
+com.apple.iokit.IOATAPIProtocolTransport 1.5.2+
+com.apple.driver.AppleFileSystemDriver 1.1.0+
+com.apple.iokit.AppleYukon2 3.1.12b14+
+com.apple.driver.AppleUSBHub 3.4.0+
+com.apple.iokit.IOUSBUserClient 3.3.1+
+com.apple.driver.AppleUSBUHCI 3.3.5+
+com.apple.driver.AppleUSBEHCI 3.4.3+
+com.apple.iokit.IOAHCIBlockStorage 1.2.1+
+com.apple.driver.AppleFWOHCI 3.8.2+
+com.apple.driver.AppleAHCIPort 1.6.0+
+com.apple.driver.AppleIntelPIIXATA 2.0.0+
+com.apple.driver.AppleEFINVRAM 1.2.0+
+com.apple.driver.AppleSmartBatteryManager 158.10.0+
+com.apple.driver.AppleRTC 1.2.3+
+com.apple.driver.AppleHPET 1.4+
+com.apple.driver.AppleACPIPCI 1.2.4+
+com.apple.driver.AppleACPIButtons 1.2.4+
+com.apple.driver.AppleSMBIOS 1.4+
+com.apple.driver.AppleACPIEC 1.2.4+
+com.apple.driver.AppleAPIC 1.4+
+com.apple.security.seatbelt 107.12+
+com.apple.nke.applicationfirewall 1.6.77+
+com.apple.security.TMSafetyNet 3+
+com.apple.driver.AppleIntelCPUPowerManagement 76.0.0+
+com.apple.driver.DiskImages 199+
+com.apple.BootCache 30.4+
+com.apple.iokit.IOSerialFamily 9.4+
+com.apple.driver.DspFuncLib 1.6.8a3+
+com.apple.iokit.CHUDKernLib 196+
+com.apple.NVDAResman 5.4.4+
+com.apple.iokit.IO80211Family 216.1+
+com.apple.iokit.IOHDAFamily 1.6.8a3+
+com.apple.iokit.IOAudioFamily 1.6.9fc3+
+com.apple.kext.OSvKernDSPLib 1.1+
+com.apple.driver.IOPlatformPluginFamily 3.4.0d10+
+com.apple.driver.AppleSMC 2.2.1d2+
+com.apple.iokit.IONDRVSupport 1.7.3+
+com.apple.iokit.IOGraphicsFamily 1.7.3+
+com.apple.driver.AppleUSBBluetoothHCIController 2.1.6f8+
+com.apple.iokit.IOBluetoothFamily 2.1.6f8+
+com.apple.iokit.IOUSBHIDDriver 3.2.2+
+com.apple.driver.AppleUSBComposite 3.2.0+
+com.apple.iokit.IOSCSIBlockCommandsDevice 2.0.9+
+com.apple.iokit.IOBDStorageFamily 1.5+
+com.apple.iokit.IODVDStorageFamily 1.5+
+com.apple.iokit.IOCDStorageFamily 1.5+
+com.apple.iokit.IOSCSIArchitectureModelFamily 2.0.9+
+com.apple.iokit.IONetworkingFamily 1.6.1+
+com.apple.iokit.IOUSBFamily 3.4.3+
+com.apple.iokit.IOFireWireFamily 3.4.7+
+com.apple.iokit.IOAHCIFamily 1.5.0+
+com.apple.iokit.IOATAFamily 2.0.1+
+com.apple.driver.AppleEFIRuntime 1.2.0+
+com.apple.iokit.IOSMBusFamily 1.1+
+com.apple.iokit.IOStorageFamily 1.5.6+
+com.apple.iokit.IOHIDFamily 1.5.5+
+com.apple.driver.AppleACPIPlatform 1.2.4+
+com.apple.iokit.IOACPIFamily 1.2.0+
+com.apple.iokit.IOPCIFamily 2.6+
*And here's the one that happened after I'd installed my Rosetta Stone update:*
+Mon Jun 15 15:18:58 2009+
+panic(cpu 0 caller 0x00C53643): NVRM[0]: Read Error 0x00020400: BAR0 0x92000000 0x350eb000 0x084700a2 D0 P2/4+
+Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)+
+0x493ff868 : 0x12b4c6 (0x45ec20 0x493ff89c 0x13355c 0x0)+
+0x493ff8b8 : 0xc53643 (0xe83e20 0xe83e20 0xe483ec 0x0)+
+0x493ff918 : 0xf0cdfe (0x4c7dc04 0x4c2a004 0x20400 0xc8fbce)+
+0x493ff958 : 0xf3087d (0x4c2a004 0x20400 0x493ff988 0x898)+
+0x493ff978 : 0xd26598 (0x4c2a004 0x24453098 0x0 0x493ff99c)+
+0x493ff9a8 : 0xd14b57 (0x4c2a004 0x24453004 0x1 0x493ff9ec)+
+0x493ffa08 : 0xdb60b1 (0x4c2a004 0x4f73c04 0x1000f880 0x0)+
+0x493ffab8 : 0xdb56d9 (0x4c2a004 0x4d3a404 0x0 0x0)+
+0x493ffb38 : 0xef5bcf (0x4c2a004 0x4d3a404 0x1a 0x2)+
+0x493ffbb8 : 0xef6262 (0x4c2a004 0x4dbf404 0x400000 0x493ffcdc)+
+0x493ffd38 : 0xf273fb (0x4c2a004 0x4dbf404 0x0 0x0)+
+0x493ffe88 : 0xda9353 (0x4c2a004 0x4f73c04 0x0 0x0)+
+0x493ffed8 : 0xc53aff (0x4c2a004 0x4f73c04 0x0 0x0)+
+0x493fff18 : 0x425fbb (0x0 0x5341400 0x1 0x19fec4)+
+0x493fff68 : 0x425118 (0x5341400 0x5dbb000 0x493fff98 0x136efd)+
+0x493fff98 : 0x424dfa (0x48061c0 0x49ff340 0x5dbb000 0x0)+
+ Backtrace continues...+
+Kernel loadable modules in backtrace (with dependencies):+
com.apple.nvidia.nv50hal(5.4.4)@0xe99000->0x10ecfff
+dependency: com.apple.NVDAResman(5.4.4)@0xc3a000+
com.apple.NVDAResman(5.4.4)@0xc3a000->0xe98fff
+dependency: com.apple.iokit.IONDRVSupport(1.7.3)@0xc2c000+
+dependency: com.apple.iokit.IOPCIFamily(2.6)@0x5cd000+
+dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0xba0000+
+BSD process name corresponding to current thread: kernel_task+
+Mac OS version:+
9J61
+Kernel version:+
+Darwin Kernel Version 9.7.0: Tue Mar 31 22:52:17 PDT 2009; root:xnu-1228.12.14~1/RELEASE_I386+
+System model name: MacBookPro3,1 (Mac-F4238BC8)+
+System uptime in nanoseconds: 7586677367397+
+unloaded kexts:+
+com.apple.driver.InternalModemSupport 2.4.0 - last unloaded 205191084981+
+loaded kexts:+
+com.google.filesystems.fusefs 2.0.3 - last loaded 5632480381244+
+com.parallels.kext.prl_vnic 4.0 3810.351321+
+com.parallels.kext.prl_netbridge 4.0 3810.351321+
+com.parallels.kext.prl_hypervisor 4.0 3810.351321+
+com.parallels.kext.prlhidhook 4.0 3810.351321+
+com.parallels.kext.prlusbconnect 4.0 3810.351321+
+com.apple.filesystems.udf 2.0.2+
+com.apple.filesystems.msdosfs 1.5.4+
+com.apple.driver.AppleHWSensor 1.9d0+
+com.apple.filesystems.ntfs 2.1+
+com.apple.driver.IOBluetoothBNEPDriver 2.1.6f8+
+com.apple.filesystems.autofs 2.0.2+
+com.apple.iokit.IOBluetoothSerialManager 2.1.6f8+
+com.apple.driver.AppleUpstreamUserClient 2.7.5+
+com.apple.driver.AppleUSBTrackpad 1.7.4f1+
+com.apple.driver.AppleUSBTCKeyEventDriver 1.7.4f1+
+com.apple.driver.AppleUSBTCKeyboard 1.7.4f1+
+com.apple.DontSteal_Mac_OSX 6.0.3+
+com.apple.driver.AppleIRController 110+
+com.apple.driver.AppleHDA 1.6.8a3+
+com.apple.iokit.CHUDUtils 200+
+com.apple.GeForce 5.4.4+
+com.apple.iokit.CHUDProf 207+
+com.apple.nvidia.nv50hal 5.4.4+
+com.apple.driver.AirPort.Atheros 319.10.3+
+com.apple.driver.AppleHDAController 1.6.8a3+
+com.apple.driver.SMCMotionSensor 2.1.1d2+
+com.apple.driver.AudioIPCDriver 1.0.6+
+com.apple.kext.AppleSMCLMU 1.4.3d2+
+com.apple.driver.ACPISMCPlatformPlugin 3.4.0d10+
+com.apple.driver.AppleLPC 1.2.12+
+com.apple.driver.AppleBacklight 1.6.0+
+com.apple.iokit.IOFireWireIP 1.7.7+
+com.apple.driver.CSRUSBBluetoothHCIController 2.1.6f8+
+com.apple.driver.AppleUSBMergeNub 3.4.3+
+com.apple.iokit.IOUSBMassStorageClass 2.0.6+
+com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.0.9+
+com.apple.iokit.SCSITaskUserClient 2.0.9+
+com.apple.driver.XsanFilter 2.7.91+
+com.apple.iokit.IOATAPIProtocolTransport 1.5.2+
+com.apple.iokit.AppleYukon2 3.1.12b14+
+com.apple.iokit.IOAHCIBlockStorage 1.2.1+
+com.apple.driver.AppleUSBHub 3.4.0+
+com.apple.iokit.IOUSBUserClient 3.3.1+
+com.apple.driver.AppleFWOHCI 3.8.2+
+com.apple.driver.AppleUSBEHCI 3.4.3+
+com.apple.driver.AppleUSBUHCI 3.3.5+
+com.apple.driver.AppleAHCIPort 1.6.0+
+com.apple.driver.AppleIntelPIIXATA 2.0.0+
+com.apple.driver.AppleEFINVRAM 1.2.0+
+com.apple.driver.AppleSmartBatteryManager 158.10.0+
+com.apple.driver.AppleRTC 1.2.3+
+com.apple.driver.AppleHPET 1.4+
+com.apple.driver.AppleACPIPCI 1.2.4+
+com.apple.driver.AppleACPIButtons 1.2.4+
+com.apple.driver.AppleSMBIOS 1.4+
+com.apple.driver.AppleACPIEC 1.2.4+
+com.apple.driver.AppleAPIC 1.4+
+com.apple.security.seatbelt 107.12+
+com.apple.nke.applicationfirewall 1.6.77+
+com.apple.security.TMSafetyNet 3+
+com.apple.driver.AppleIntelCPUPowerManagement 76.0.0+
+com.apple.driver.DiskImages 199+
+com.apple.BootCache 30.4+
+com.apple.iokit.IOSerialFamily 9.4+
+com.apple.iokit.IOUSBHIDDriver 3.2.2+
+com.apple.driver.DspFuncLib 1.6.8a3+
+com.apple.iokit.CHUDKernLib 196+
+com.apple.NVDAResman 5.4.4+
+com.apple.iokit.IO80211Family 216.1+
+com.apple.iokit.IOHDAFamily 1.6.8a3+
+com.apple.iokit.IOAudioFamily 1.6.9fc3+
+com.apple.kext.OSvKernDSPLib 1.1+
+com.apple.driver.IOPlatformPluginFamily 3.4.0d10+
+com.apple.driver.AppleSMC 2.2.1d2+
+com.apple.iokit.IONDRVSupport 1.7.3+
+com.apple.iokit.IOGraphicsFamily 1.7.3+
+com.apple.driver.AppleUSBBluetoothHCIController 2.1.6f8+
+com.apple.iokit.IOBluetoothFamily 2.1.6f8+
+com.apple.driver.AppleUSBComposite 3.2.0+
+com.apple.iokit.IOSCSIBlockCommandsDevice 2.0.9+
+com.apple.iokit.IOBDStorageFamily 1.5+
+com.apple.iokit.IODVDStorageFamily 1.5+
+com.apple.iokit.IOCDStorageFamily 1.5+
+com.apple.iokit.IOSCSIArchitectureModelFamily 2.0.9+
+com.apple.iokit.IONetworkingFamily 1.6.1+
+com.apple.iokit.IOFireWireFamily 3.4.7+
+com.apple.iokit.IOUSBFamily 3.4.3+
+com.apple.iokit.IOAHCIFamily 1.5.0+
+com.apple.iokit.IOATAFamily 2.0.1+
+com.apple.driver.AppleEFIRuntime 1.2.0+
+com.apple.iokit.IOSMBusFamily 1.1+
+com.apple.iokit.IOStorageFamily 1.5.6+
+com.apple.iokit.IOHIDFamily 1.5.5+
+com.apple.driver.AppleACPIPlatform 1.2.4+
+com.apple.iokit.IOACPIFamily 1.2.0+
+com.apple.iokit.IOPCIFamily 2.6+
Message was edited by: lunarstar

Why is my screen flashing and distorting?

The monitor on my Mac Book Pro is flashing and freezing. Even had what appeared as raindrops frozen on the screen.
Had to close with on off switch, came back without raindrops, but still flashing intermittently.
Am I losing monitor or have I caught a bug ?

It is either resetting or updating. If the device went through the full restart and is working now then you are OK to use it.
If it is still on the apple logo you may have to hold the on/off button and the large Home button in the middle at the same time until the little apple shows and then release both buttons. This will refresh your device.
http://www.apple.com/support
This is the place to get answers and steps to fix many issues.
Good Luck

My MacBook was acting weird so I restarted it and when I login a white screen flashes and goes back to the login page. Help?

My MacBook was acting weird like sometimes I would log on and I wouldn't be able to type my password for a couple seconds,but it usually logged in after that. Then I left my computer open after installing the recent update after that all my applications were not responding. So I shut it down, when I turned it back on about an hour later it went to this loading screen and then to the login like usual. After I tried logging in a white screen flashed and it went back to the login/ password screen like nothing happened. Any ideas on what happened and what I can do to fix it?

Reinstall OS X;
Reinstalling Lion/Mountain Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

HT201401 Iphone 3GS screen flashes and doesn't display

Hi there
i have been given a Iphone 3gs 16Gb from a friend as they have upgraded to a nexus 4 and the screen connecter was damaged so i have now replaced the LCD with a new one now the screen flashes and doesn't show anything on the screen
there is no display at all not dark or dim display i have no idea if the screen is working but i have got two so called new screens and both are the same
i have recovered the Iphone as it connnects to Itunes and appears to fuction correctly with out any problems just not able to see what is on the screen touchscreen is working fine too as i was able to switch the iphone off as my friend had left a passcode on the phone so i put the phone into recovery mode from been on and recovered the phone
im out of ideas now please help
Thanks
Simon

Hi All
the iphone is now not displaying anything there is no flash or anything on the screen i have checked the 6r8 coil and it looks fine
the phone still connects to itunes and appers to work as normal but im unable to see any display so im unable to set it up so i can ring the phone and check
thanks
Simon

Ipod screen flashes and chirps ???

I have a 20GB click wheel Ipod. Last night it just started to make a high pitch sound and then changed to a screen flashing and chirping sound simultaneously? The flashing and chirping continued and I could not do anything. It was basically frozen, then I connected it to the fire wire port and the apple logo appeared and it seemed to fix itself. The battery was dead, I don't know if that was a symptom. I restored the Ipod and I'm waiting to see if it happens again when the battery is dead. Any help/advice would be appreciated.

Welcome to the Apple Discussions, Derek Skaalen!
I'd get a replacement ASAP. That doesn't sound good.
Ian

MBP 13" Screen Flickers and Freezes After Upgrading HDD

Hi There,
I have seen on here and a few other forums that people are having issues with graphics cards or overheating that is making the MBP screen flicker and freeze.
Mine has been fine until yesterday when I installed a new Seagte 1tb HDD. It works ok, but every now and then the screen starts to flicker, half of it goes black and the system freezes. Sometimes it's just for a few minutes, but sometimes I need to do a hard reset by holden the power button down for 5 seconds.
Here are the details:
MBP 5,5 13" (2008 I think - Can't remember)
Boot ROM Version:
MBP55.00AC.B03
SMC Version (system):
1.47f2
Version 10.6.8
2.26Ghz Intel Core 2 Duo
8gb 1067 Mhz DDR3 (Just upgraded, but before the hard drive and no issues)
1TB Seagate Momentus SATA HDD
As mentioned, I upgraded the RAM a week or so ago and it has been running fine. I put the new hard drive in last night and after a few hours, the flickering started.
I cloned the hard drive using SuperDuper and it all started up fine.
So far, I have verified and repaired permissions, checked SMART status and run a SMART Utility diagnostic. All comes back ok.
I cleared the PRAM and installed smcfan control as another forum with similar issues said it was a overheating problem and running the fan control program should fix it. I did that at 8am this morning and it has run great all day. Come 5.30pm, the flickering started and then it froze.. GREAT!!!!
It's so frustrating, I was really looking forward to having my MBP upgraded and running fast again.
Any ideas or tips would be very welcome.
Thanks in advance.

set old HD. If problem will gone - you have weakened power supply or internal power converters. Yours new HD draw more power during spinup or something - so voltage on internal bus lowers and memory or videocard freaks.
5.30 PM looks like a time when there begins a lot of load on city energy grid - so voltage in wall socket goes a bit unstable, it may also add to problem.
if problem is gone when you are on battery power - its power supply. If it persists or get worse when on battery - its internal power convertors.

When I try to use Safari, I get a screen flash and then it closes. How can I fix this?

When I try to use Safari, I get a screen flash and then it closes. How can I fix this?

1. Double-click the Home button to close all Inactive Apps in Task Bar
2. Hold the Apps in Task Bar down for a second or two until you see the minus sign
3. Tap the minus sign to close Apps
4. Tap center of screen to return to Home Screen
5. Reset iPad. Hold the Sleep and Home button down for about 10 second until you see the Apple logo. Ignore the red slider

Shockwave Flash and freeze errors in Forms Central

Everyone on my team is having issues opening Forms Central - Shockwave Flash and freeze errors. Is this an error with everyone? Its affecting 26 people.

Nicole,
I am sorry to hear you are having problems logging in. I just tested this function on Safari and Chrome and had no problem. Can you tell me about the systems that are experincing the problem. What OS? What Broswer? What version of Flash is installed? Are the systems individually managed or managed by a central IT group?
Andrew

Screen flashes and then goes black after CPU load

Yesterday morning I upgraded my MacBook Pro 6,2 (Mid 2010) to OS X Lion. Since then I've been having issues while performing CPU-not-too-intensive tasks. Every once in a while my screen flashes for a split second and then turns completely black. The MBP is unresponsive so I'm forced to shut it down using the power button.
At first i though this was a Lion issue. However, it has happened again just now while I was on Windows through BootCamp. I was checking my e-mail and performing some other mundane tasks for about an hour, and then while trying to copy some files to an external Hard Drive my screen flashed and went black.
Hardware issue then??
Any help would be greatly appreciated.

It's already happened 4-5 times right when I pressed Cmd+D to bookmark a site on Safari. What the heck? That isn't even a CPU load.
Here's the error report:
Interval Since Last Panic Report: 26887 sec
Panics Since Last Report:          14
Anonymous UUID:                    D5913603-D6D0-4A1E-9827-257C6E51A196
Mon Jul 25 19:40:23 2011
panic(cpu 0 caller 0xffffff7f809522bf): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0xffffff80a071c000 0x0a5480a2, D0, P3/4
Backtrace (CPU 0), Frame : Return Address
0xffffff807d40b100 : 0xffffff8000220702
0xffffff807d40b180 : 0xffffff7f809522bf
0xffffff807d40b210 : 0xffffff7f80a423fc
0xffffff807d40b260 : 0xffffff7f80a424bc
0xffffff807d40b2c0 : 0xffffff7f80cec749
0xffffff807d40b400 : 0xffffff7f80a61519
0xffffff807d40b430 : 0xffffff7f8095bc4a
0xffffff807d40b4e0 : 0xffffff7f8095754c
0xffffff807d40b6d0 : 0xffffff7f8095881f
0xffffff807d40b790 : 0xffffff7f817b8876
0xffffff807d40b8a0 : 0xffffff7f817b8d6c
0xffffff807d40b8c0 : 0xffffff7f8178a84c
0xffffff807d40b8e0 : 0xffffff7f8178b87d
0xffffff807d40baa0 : 0xffffff7f817d399a
0xffffff807d40bb60 : 0xffffff7f817888fd
0xffffff807d40bbc0 : 0xffffff8000651f8e
0xffffff807d40bbe0 : 0xffffff800065286a
0xffffff807d40bc40 : 0xffffff8000652ff0
0xffffff807d40bd80 : 0xffffff80002a3738
0xffffff807d40be80 : 0xffffff8000222ff6
0xffffff807d40beb0 : 0xffffff8000214829
0xffffff807d40bf10 : 0xffffff800021bb58
0xffffff807d40bf70 : 0xffffff80002ae380
0xffffff807d40bfb0 : 0xffffff80002d83a3
      Kernel Extensions in backtrace:
         com.apple.NVDAResman(7.0.2)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f808 f2000->0xffffff7f80bc8fff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffff ff7f8087e000
            dependency: com.apple.iokit.IONDRVSupport(2.3)[E99C8907-946D-3F1A-A261-4C0F2D5D0451]@0xffff ff7f808e0000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3)[897EB322-FD55-36D7-A68E-9E9C34A74A84]@0xf fffff7f808a8000
         com.apple.nvidia.nv50hal(7.0.2)[2E84958C-1EEC-316B-9F7A-68C368F83476]@0xffffff7 f80bc9000->0xffffff7f80eeafff
            dependency: com.apple.NVDAResman(7.0.2)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f808 f2000
         com.apple.GeForce(7.0.2)[18E50F21-1E7F-3FFE-B298-7CD7A11879F8]@0xffffff7f8177d0 00->0xffffff7f81839fff
            dependency: com.apple.NVDAResman(7.0.2)[7E65ECA2-D3A1-35F8-B845-C975FB531E7E]@0xffffff7f808 f2000
            dependency: com.apple.iokit.IONDRVSupport(2.3)[E99C8907-946D-3F1A-A261-4C0F2D5D0451]@0xffff ff7f808e0000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)[95ABB490-3AB5-3D5E-9C21-67089A9AE6A1]@0xffff ff7f8087e000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3)[897EB322-FD55-36D7-A68E-9E9C34A74A84]@0xf fffff7f808a8000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
11A511
Kernel version:
Darwin Kernel Version 11.0.0: Sat Jun 18 12:56:35 PDT 2011; root:xnu-1699.22.73~1/RELEASE_X86_64
Kernel UUID: 24CC17EB-30B0-3F6C-907F-1A9B2057AF78
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 119605728603
last loaded kext at 58454533114: com.paragon-software.filesystems.ntfs          82 (addr 0xffffff7f8217f000, size 278528)
loaded kexts:
com.paragon-software.filesystems.ntfs          82
com.logmein.hamachi          1.0
com.apple.driver.AppleHWSensor          1.9.4d0
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AppleHDA          2.1.1f11
com.apple.driver.AppleUpstreamUserClient          3.5.9
com.apple.driver.AppleMCCSControl          1.0.24
com.apple.driver.AppleMikeyDriver          2.1.1f11
com.apple.driver.AppleIntelHDGraphics          7.0.2
com.apple.driver.AGPM          100.12.40
com.apple.driver.AudioAUUC          1.59
com.apple.driver.AppleSMCLMU          2.0.1d2
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.driver.AppleIntelHDGraphicsFB          7.0.2
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.2.0
com.apple.driver.AppleMuxControl          3.0.8
com.apple.GeForce          7.0.2
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0b2
com.apple.driver.AppleLPC          1.5.1
com.apple.driver.AppleBacklight          170.1.9
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleUSBTCButtons          220.8
com.apple.driver.AppleIRController          309
com.apple.driver.AppleUSBCardReader          3.0.0
com.apple.driver.AppleUSBTCKeyEventDriver          220.8
com.apple.driver.AppleUSBTCKeyboard          220.8
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          32
com.apple.iokit.SCSITaskUserClient          3.0.0
com.apple.iokit.IOAHCIBlockStorage          2.0.0
com.apple.driver.AppleUSBHub          4.4.0
com.apple.driver.AppleFWOHCI          4.8.6
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.iokit.AppleBCM5701Ethernet          3.0.6b9
com.apple.driver.AppleEFINVRAM          1.5.0
com.apple.driver.AirPort.Brcm4331          500.20.6
com.apple.driver.AppleAHCIPort          2.1.8
com.apple.driver.AppleUSBEHCI          4.4.0
com.apple.driver.AppleUSBUHCI          4.4.0
com.apple.driver.AppleACPIButtons          1.4
com.apple.driver.AppleRTC          1.4
com.apple.driver.AppleHPET          1.6
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.4
com.apple.driver.AppleAPIC          1.5
com.apple.driver.AppleIntelCPUPowerManagementClient          166.0.0
com.apple.nke.applicationfirewall          3.0.30
com.apple.security.quarantine          1
com.apple.driver.AppleIntelCPUPowerManagement          166.0.0
com.apple.iokit.IOBluetoothSerialManager          2.5f17
com.apple.iokit.IOSerialFamily          10.0.5
com.apple.driver.AppleHDAHardwareConfigDriver          2.1.1f11
com.apple.driver.DspFuncLib          2.1.1f11
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOSurface          80.0
com.apple.iokit.IOAVBFamily          1.0.0d22
com.apple.iokit.IOFireWireIP          2.2.3
com.apple.iokit.IOAudioFamily          1.8.3fc11
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.1.1f11
com.apple.iokit.IOHDAFamily          2.1.1f11
com.apple.driver.AppleGraphicsControl          3.0.8
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleSMC          3.1.1d2
com.apple.driver.IOPlatformPluginFamily          4.7.0b2
com.apple.driver.AppleBacklightExpert          1.0.3
com.apple.nvidia.nv50hal          7.0.2
com.apple.NVDAResman          7.0.2
com.apple.iokit.IONDRVSupport          2.3
com.apple.iokit.IOGraphicsFamily          2.3
com.apple.kext.triggers          1.0
com.apple.driver.AppleFileSystemDriver          13
com.apple.driver.BroadcomUSBBluetoothHCIController          2.5f17
com.apple.driver.AppleUSBBluetoothHCIController          2.5f17
com.apple.iokit.IOBluetoothFamily          2.5f17
com.apple.iokit.IOSCSIBlockCommandsDevice          3.0.0
com.apple.iokit.IOUSBMassStorageClass          3.0.0
com.apple.driver.AppleUSBMultitouch          220.23
com.apple.iokit.IOUSBHIDDriver          4.4.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.0.0
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.7
com.apple.driver.XsanFilter          403
com.apple.driver.AppleUSBMergeNub          4.4.0
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOAHCISerialATAPI          2.0.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.0.0
com.apple.iokit.IOUSBUserClient          4.4.0
com.apple.iokit.IOFireWireFamily          4.4.3
com.apple.iokit.IOEthernetAVBController          1.0.0d5
com.apple.iokit.IO80211Family          400.40
com.apple.iokit.IONetworkingFamily          2.0
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IOUSBFamily          4.4.0
com.apple.driver.AppleEFIRuntime          1.5.0
com.apple.iokit.IOHIDFamily          1.7.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          165
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          326
com.apple.iokit.IOStorageFamily          1.7
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.4
com.apple.iokit.IOPCIFamily          2.6.5
com.apple.iokit.IOACPIFamily          1.4
Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334648302D4346382020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.100.98.75.6)
Bluetooth: Version 2.5.0f17, 2 service, 12 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: TOSHIBA MK5055GSXF, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 8
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3

TS3274 IPad screen scrabbles and freezes

Every now and then my IPad screen scrambles and freezes. This has been going on for several months and is happening more and more often.

Reset iPad
Hold down the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears
Note: Data will not be affected.

Usb mouse auto disconnect time and time,Screen flash and flash when I use discrete graphic card

as title
My usb mouse auto disconnect and reconnect time and time,
no one knows when the mouse will disconnect,but every time when that mouse disconnect ,it will be reconnected in 2-5sec.
Screen flash and flash when I use discrete graphic card with the battery or use AC when connect the external display with VGA CABLE.
Mouse: Logitec G400/G1
Display:Lenovo D2081WIDE
machine:T430 2349 CTO

system info:
machine TYPE: THINKPAD T430 /2349CTO
operating system :Lenovo OEM ultimate X64 SP1
mouse type:Logitech G400 and Logitech G1
time:from 2012-10 to now
threat NO.1
USB mouse auto disconnect and reconnect time and time,no one knows when the mouse will disconnect,but every time when that mouse disconnect ,it will be reconnected in 2-5sec.
every time when the mouse disconnect I heard the sound which like USB DEVICE unplug,and when it reconnected I heard the sound which like USB DEVICE plug in.
threat NO.2
Screen flash and flash when I use discrete graphic card with the battery or use AC when connect the external display with VGA CABLE.
threat NO.3
the battery auto losing capacity!!!!!!
1% everyday about 0.2Wh
since I bought to now,
the Design capacity has losing from 57.XX Wh to 47.52Wh
and full charge capacity is 48.68.
the battery info:
cycle count is 18
Bar-Code number 1ZKFD27S1RF
SerialNumber 1896
First used date 2012-09
FRU 45N1001
Firmware 0003-0080-0100-0165

Why is my iPhone 6 Plus home screen flickering and freezing up?

Why is my iPhone 6 Plus home screen flickering and freezing up?

Try these steps as needed:
1. Reset phone - press both home and lock buttons for at least 10 seconds, releasing when the Apple logo appears
2. Restore to factory settings:
Use iTunes to restore your iOS device to factory settings
3. Get warranty service from Apple in the country where the phone was purchased

MacBook Pro screen flickers and freezes after Snow Leopard/Safari 5 updates

Hi guys,
I have a silver 120GB 15-inch MacBook Pro from Summer 2007 with 3GB RAM and 25+GB free space which has recently begun to freeze irrecoverably. The first appearance of these symptoms seems to coincide with my installing the Snow Leopard 10.6.6 update via Software Update.
I'm not particularly well versed in computer technology, but will try to describe my problem as detailedly as possible.
What happens is this:
1. I start the computer as per usual, with only a couple of startup items. Everything's fine.
2. I start working. Use a lot of Safari 5 for browsing websites, often with some kind of Flash or "Flash-type" content such as banner ads, videos, even full Flash designs. I may also have programs such as QuickTime, VLC or an image editor open, if not necessarily "actively" doing anything. Everything's still fine - I'm able to both browse websites and watch videos as usual.
3. After a while of active working - say, 1-3 hours - I notice browsing websites gets a little choppy. Display features such as the file list view in Finder may or may not appear properly. The rotating wait cursor may or may not appear from time to time.
4. Immediately after symptom no. 3, the next time I start to watch a video, either via Safari 5 (say for example something on DailyMotion.com) or a file via QuickTime, something goes wrong.
Following no. 4, one of three things invariably happen:
5a) The video freezes and the entire screen flickers from black to the screen view very quickly two or three times, after which the computer or screen appears to freeze. The cursor still moves, but nothing reacts to it - open windows become completely unresponsive, nor does the top or any other menu react in any way to clicking. The "menu row" of application items, which normally appears when I move the cursor to the very bottom of the screen, doesn't appear. Restarting "blindly" by pressing the Off-button once and pressing R doesn't work. I'm forced to do a hard reboot, after which the computer is once again fine until the next two hours of active working. This usually happens ONLY when I try to watch a video in Full Screen-mode.
5b) I notice the video freezing only just in time, and am able to pause it and "esc" out of Full Screen-mode, and the computer remains operational. However, as soon as I again try to play video in Full Screen-mode, everything described in 5a. happens.
5c) The video stops playing, and the screen reverts momentarily to pale blue before switching to the login screen. I login again with my details, and everything appears to be fine again until the next two hours of active working. The computer "starts up" a lot faster than with a hard reboot. This usually happens ONLY when I've tried to watch a video in its original size, i.e. when not in Full Screen-mode.
This happens 1-4 times a day, and it appears to depend directly on how much work I've been doing on the computer. The less I use it in the course of a day, the longer it takes until the next time it freezes.
So, in a way, I'm able to replicate this problem. 95% of the time the screen has frozen while watching or starting to watch (usually already when starting to watch) video footage, but it has also frozen a couple of times just switching between e.g. Safari 5 and an image editor or browsing a website with a Flash banner ad or embedded video content (which however hasn't necessarily been playing); today, the screen froze when I tried to open a website made entirely with Flash.
Although it could be just a coincidence, I believe this issue first appeared when I updated Snow Leopard to 10.6.6 via Software Update alongside some other pending updates, including as far as I recall one for Safari 5. The update process appeared to have gone well at the time, though, and was not interrupted in any way. I have never had this specific problem with the computer/screen before, though.
I've read a couple of threads here regarding very similar issues with newer MBP models than mine, in which it has been suggested that the fault may lie in a malfunctioning NVIDIA GeForce graphics card. Now I've had that replaced already once because my screen went unexpectedly completely blank after a forced reboot 1-2 years ago (I don't remember exactly), but according to my System Profiler info the card still a GeForce 8600M GT. Can it be failing again?
I've also had some kind of a RAM card failure once. As far as I understood it, one of the RAM cards had fried and was preventing the computer from starting up. I replaced the bad 1GB card with a new 2GB one and the problem was resolved. Before the computer died, there were also other symptoms, but they were not similar to these.
I'm also doing the Apple Hardware Test tomorrow. Any other suggestions, though, than the graphics card?
*Could this have to do with Flash or Safari 5?* Just hear me out. Even though my computer has frozen from watching a video in just QuickTime, Safari 5 has always been open in the background at the same time, and more likely than not with websites with "Flash" content open. And come to think of it, before I performed the Snow Leopard and Safari 5 updates, I used to have daily problems viewing Flash video in Safari 5, the video content either suddenly showing up as "Plug-in Failure" or crashing the browser; I've had both Safari 5 and the Safari 5 Flash plug-in "quit unexpectedly" countless times in the past, almost daily. Sometimes the "Plug-in Failure" could be fixed just by refreshing the browser view; at other times, Safari 5 would stop showing Flash content altogether - Flash banner ads (such as Google ads), YouTube and other Flash videos, everything - until I quit and restarted Safari 5. BUT - since the day I updated everything via Software Update, I don't remember this happening; it never gets to "Plug-in Failure" now. Could it be worth trying to use e.g. just Firefox for a while or is there something (e.g. Adobe Flash) that I could try reinstall? Or am I just clutching at straws here?
Thanks for reading this long, long post!

Do you have access to an Apple Store? If so, it may be worth making an appointment at the genius bar and having them run the test for the NVIDIA problem. Since your replacement logic board still has the NVIDIA GeForce 8600 M GT video chip, it could be starting to happen to your replacement logic board.
I also agree with all of CMCSK's suggestions. Freezing is often associated with hard drive problems. You might also want to run SMART Utility:
http://www.apple.com/downloads/macosx/systemdiskutilities/smartutility.html
You can download the demo and run it several times for free. It will give you a very comprehensive view of the physical health of your hard drive. If you still have the original one from 2007, it's getting pretty long in the tooth and may be approaching the end of its average useful life of 3-5 years. I just recently had to replace my original 2007 Fujitsu drive.
If your drive is headed south, and is also too small, it may be time to upgrade to a larger and faster drive.
The software update probably didn't cause the problems, but it may have exposed problems that were already in existence.
Good luck!

Screen flashing and freezing

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