IMac, gray screen and beeping.

5 or 6 year old iMac running leopard. Don't know version, but always updated. I downloaded skype last night. Everything working fine. This morning, while going through Skype info and buttons, got a mask saying "need to restart" or "need to refresh" (not sure which). I had no mouse or keyboard controls. Held power button down to shut off. Restarted, then gray screen and constant beeping. Tried several times, same result. Unplugged from power then restarted, same result. Help?
(working from my laptop)

Sounds like you got a kernel panic. A kernel panic is usually, but not always, caused by hardware, with memory a leading cause. Once you're able to reboot, if they continue, see this kernel panic FAQ: http://www.thexlab.com/faqs/kernelpanics.html
On the gray screen and beeping, if your iMac has an Intel processor, see this Apple note: http://support.apple.com/kb/HT2341?viewlocale=en_US . If it has a PowerPC processor, see: http://support.apple.com/kb/HT1547 . If you're not sure, Intel-based iMacs were introduced in early 2006.

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Yesterday my macbook was fine, i shut it down and today i tryed to switch it on, and it made that cute power on sound, so far so good, but then the screen turns kind of light gray, no icons, just plain color, and the thing starts gooing like "beep, beep" every 3 seconds or so.
No matter how many times i switch it on and off, all the times i get the same response.
I have done absolutely nothing different from what i am used to do, did not install any new programs nor downloaded any weird stuff. The last thing that i recall as unusual was an system update, i am not quite sure but i think it was 2 days before the problem started, so i dont really think the update was the problem ...
anyone got similar experiences and found solutions?

Sounds like a logic board failure or some other low level hardware problem, and to be honest, if that is the case, no matter what you do, or if by some miracle it boots, you should have no faith in it whatsoever. Unfortunately is sounds like you've just won a trip to the apple store. Is it 3 short beeps three long beeps, three short beeps? If you describe the beeps it could give us a better idea as to how to help. The only other possible thing I could think of is a firmware corruption, but to the best of my knowledge, that still requires a trip out. Sorry for the grim prognosis, best of luck.
-Trev

I am suddenly having a problem with my iMac - when I try to restart or shut down, it hangs on a gray screen, and I have to hard reset to turn it off. How do I fix this?

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If you're running OS X 10.8.5 or earlier, then from the menu bar, select
 ▹ System Preferences... ▹ Accessibility
If the checkbox at the bottom marked
Enable access for assistive devices
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If you're running OS X 10.9 or later, select
 ▹ System Preferences... ▹ Security & Privacy ▹ Privacy ▹ Accessibility
If any applications are listed on the right and have a checked box next to them, uncheck all the boxes and test. You may first have to click the padlock icon in the lower left corner of the window and authenticate as an administrator to unlock the settings.

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Reinstall OS X without erasing the drive
Do the following:
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Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. 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 installer.
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If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.

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Here is the most recent log:
====================================================
Interval Since Last Panic Report: 502649 sec
Panics Since Last Report:          1
Anonymous UUID:                   REMOVED
Mon Feb 4 22:31:10 2013
panic(cpu 2 caller 0xffffff800ea9db1b): "TLB invalidation IPI timeout: " "CPU(s) failed to respond to interrupts, unresponsive CPU bitmap: 0x10, NMIPI acks: orig: 0x0, now: 0x0"@/SourceCache/xnu/xnu-2050.18.24/osfmk/x86_64/pmap.c:2337
Backtrace (CPU 2), Frame : Return Address
0xffffff80f7b43ad0 : 0xffffff800ea1d626
0xffffff80f7b43b40 : 0xffffff800ea9db1b
0xffffff80f7b43bc0 : 0xffffff800eaa1ad4
0xffffff80f7b43cf0 : 0xffffff800ea61693
0xffffff80f7b43db0 : 0xffffff800ea62abb
0xffffff80f7b43f40 : 0xffffff800eab7fa9
0xffffff80f7b43fb0 : 0xffffff800eace411
BSD process name corresponding to current thread: Google Chrome
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x000000000e800000
Kernel text base: 0xffffff800ea00000
System model name: iMac12,2 (Mac-942B59F58194171B)
System uptime in nanoseconds: 3080844068507
last loaded kext at 39652583931: com.apple.driver.AppleBluetoothHIDKeyboard          165.5 (addr 0xffffff7f9048c000, size 24576)
last unloaded kext at 167199352584: com.apple.driver.AppleUSBUHCI          5.2.5 (addr 0xffffff7f8f388000, size 65536)
loaded kexts:
net.telestream.driver.TelestreamAudio          1.0.3
com.rim.driver.BlackBerryUSBDriverInt          0.0.68
com.apple.filesystems.cddafs          2.5.1
com.apple.driver.AppleBluetoothMultitouch          75.15
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AGPM          100.12.69
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AppleHDA          2.3.1f2
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.kext.AMDFramebuffer          8.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.iokit.IOBluetoothSerialManager          4.0.9f33
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.AMDRadeonAccelerator          1.0.0
com.apple.driver.AppleMikeyDriver          2.3.1f2
com.apple.driver.AppleIntelHD3000Graphics          8.0.0
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AppleSMCLMU          2.0.2d0
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.driver.ApplePolicyControl          3.2.11
com.apple.driver.AppleIntelSNBGraphicsFB          8.0.0
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleBacklight          170.2.3
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.AppleUSBCardReader          3.1.0
com.apple.driver.AppleIRController          320.15
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.2
com.apple.driver.AppleUSBHub          5.2.5
com.apple.iokit.AppleBCM5701Ethernet          3.2.5b3
com.apple.driver.AppleFWOHCI          4.9.6
com.apple.driver.AirPort.Atheros40          600.70.23
com.apple.driver.AppleAHCIPort          2.4.1
com.apple.driver.AppleUSBEHCI          5.4.0
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.AppleBluetoothHIDKeyboard          165.5
com.apple.driver.AppleHIDKeyboard          165.5
com.apple.driver.IOBluetoothHIDDriver          4.0.9f33
com.apple.driver.AppleMultitouchDriver          235.28
com.apple.driver.DspFuncLib          2.3.1f2
com.apple.kext.triggers          1.0
com.apple.iokit.IOAudioFamily          1.8.9fc10
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.IOSurface          86.0.3
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.iokit.IOAcceleratorFamily          19.0.26
com.apple.iokit.IOBluetoothFamily          4.0.9f33
com.apple.kext.AMD6000Controller          8.0.0
com.apple.kext.AMDSupport          8.0.0
com.apple.driver.AppleThunderboltEDMSink          1.1.8
com.apple.driver.AppleThunderboltEDMSource          1.1.8
com.apple.driver.AppleHDAController          2.3.1f2
com.apple.iokit.IOHDAFamily          2.3.1f2
com.apple.driver.AppleGraphicsControl          3.2.11
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleSMC          3.1.4d2
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.iokit.IONDRVSupport          2.3.5
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOGraphicsFamily          2.3.5
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleThunderboltDPOutAdapter          1.8.5
com.apple.driver.AppleThunderboltDPInAdapter          1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.5.0
com.apple.iokit.IOUSBHIDDriver          5.2.5
com.apple.driver.AppleUSBMergeNub          5.2.5
com.apple.iokit.IOUSBUserClient          5.2.5
com.apple.driver.AppleThunderboltNHI          1.6.0
com.apple.iokit.IOThunderboltFamily          2.1.1
com.apple.iokit.IOEthernetAVBController          1.0.2b1
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOAHCIFamily          2.2.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.driver.AppleKeyStore          28.21
com.apple.iokit.IOUSBMassStorageClass          3.5.0
com.apple.driver.AppleUSBComposite          5.2.5
com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.1
com.apple.iokit.IOStorageFamily          1.8
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.iokit.IOUSBFamily          5.4.0
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7.2
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
System Profile:
Model: iMac12,2, BootROM IM121.0047.B1F, 4 processors, Intel Core i7, 3.4 GHz, 8 GB, SMC 1.72f2
Graphics: AMD Radeon HD 6970M, AMD Radeon HD 6970M, PCIe, 1024 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533642465238432D48392020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333235533642465238432D48392020
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1333 MHz, 0x802C, 0x384B54463235363634485A2D3147344D3120
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1333 MHz, 0x802C, 0x384B54463235363634485A2D3147344D3120
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380: 4.0.70.23-P2P
Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: WDC WD1001FALS-403AA0, 1 TB
Serial ATA Device: OPTIARC DVD RW AD-5680H, 297.2 MB
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x850b, 0xfa200000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 5
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfd110000 / 3
=============================================
Help appreciated.

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Bugging the life out of me.

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elipsis1 wrote:
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IMac, gray screen and beeping.

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