MacBook Screen Flashes and Refreshes every 2 seconds after autoupdate

My daughter installed updates last nite (she thinks itunes, safari, quicktime?) and now her computer will turn on but the display keeps refreshing and will not completely display all her usual icons. I tried resetting the PRAM (Control Command P R) and safe boot (shift) and no luck. Any suggestions? Thanks

Marc Jaffe1 wrote:
When I tried to run the repair disk permissions I get am error message stating "no valid packages."
Any suggestions ?
This usually means someone has tinkered with the contents of /Library/Receipts & removed the ".pkg" or ".bom" items in it that tell the permissions repair procedure what the correct permissions should be. (See About Disk Utility's Repair Disk Permissions feature for the full story.)
As a rule, users should not tinker with anything in /Library or System/Library unless they know exactly what they are doing (or at least have a good backup to recover from the problems this can cause). Because the missing files may mean someone has done more tampering than just removing them, I suggest for your situation that you do consider an Archive & Install, followed by running Software Update to get all current updates into the system.
BTW, the earlier advice from nerowolfe was not about doing an install from the DVD. As he explained, after you boot from the DVD & choose your language, immediately go to the Utilities menu at the top of the screen & choose "Disk Utility" from its menu choices. The installer application will be replaced with Disk Utility, which allows you to run its checks & repairs prior to or instead of installing the OS.
I am suggesting here that you do go ahead with the install because of the potential problems with the existing one, but for other times you should know about the utilities you can run from the DVD without doing an install.

Similar Messages

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

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.

TS3274 My ipad screen is flashing about once every second when plugged in, it wont boot, no logo

I have an ipad first generation. it wont turn on when press the power button. When i plug it into the wall, the screen blinks about once every second. It does not display any logo.
it doesnt seem like i can reset it or put it into recovery mode.
Any suggestions? do you think it has a hardware problem?

Hello oilyragfun, I am having the exact same problem. Did you ever get this resolved?
No history of drops or abuse. When I plug it in the screen just dimly flashes or pulses about once every second. No logo, just the entire screen dimly backlit for a half of a second the blank again. I can't get it to respond with any combination of buttons or reset proceadures.

HT3205 Green light flashing on and off every second

What is indicated by the green light on the charger going off and on every second?

Usually it is a charger or battery issue.
Try a SMC reset:
http://support.apple.com/kb/HT396
Use the method which applies to your Mac, a battery you should remove (most likely)
You can also check the battery status by clicking on the Apple logo and About This Mac, More info or system profile (depending on which oSX you are using as it is not in your profile) Power in the left side bar and check battery health and other stats.

Every video or podcast stops and starts every second

Any help would be appreiciated, using Chrome, Windows XP Pro with SP3, Pentium 4 2.4GHz, with 2GB Ram, with Nvidia Gforce 5200 video card! Too old a system??

hi, all three are pretty much the same, and its not a buffering issue. I hav Verizon Fios and had a WUGNET speed test show download speed being 11.3 Mbps and upload of 1.24. It was possible the Html was slightly better but not by much.
Jim
Date: Thu, 25 Oct 2012 15:22:01 -0600
From: [email protected]
To: [email protected]
Subject: Every video or podcast stops and starts every second
    Re: Every video or podcast stops and starts every second
    created by Chris Campbell in Using Flash Player - View the full discussion
That should be fine for system specs. My first guess would be network bandwidth issues. Does it seem like the video/audio buffers fast enough or does the buffer continue to run out when the item is played? Try these two links out, do either of them play better? HTML5 videoNon-HTML5 video Thanks,Chris
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     Start a new discussion in Using Flash Player by email or at Adobe Community
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How to make Mavericks Activity monitor refresh every second

I noticed that the Mavericks version of Activity Monitor now refreshes only every 5 seconds. It used to be every second. I am guessing they intend to make Activity Monitor more energy efficient this way, but is it possible to make it refresh every second like it used to ?
Thank you !

All right,I have set up my Philips LCD vertical display content with normal built in screen... need playing with xrandr & xorg.conf more then....
one question, intel driver in linux support vertical screen?
Last edited by andywxy (2008-11-19 15:23:01)

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

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

I disabled my Macbook Hard Disk and lock the settings, after i try to reboot, the system wouldn't come up. It refuses to read instructions from the hard disk. How can i enable the hard disk when the system wouldn't come up?

I disabled my Macbook Hard Disk and lock the settings, after i try to reboot, the system wouldn't come up. It refuses to read instructions from the hard disk. How can i enable the hard disk when the system wouldn't come up?

How do you disabled it if running the same?

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

My screen opened, and with every click the page (letters/images) got bigger. I can not get it to return to normal image size. I have to use the slide bar to read across the page. What do i do to correct it back to normal size???

Question
My screen opened, and with every click the page (letters/images) got bigger. I can not get it to return to normal image size. I have to use the slide bar to read across the page. What do i do to correct it back to normal size???

Hi jholzworth,
It sounds like you might have accidentally hit the zoom button. Try hitting ''CTRL + 0'' to return it to normal size. Just so you are aware, ''CTRL'' and ''+'' will zoom in and ''CTRL'' and ''-'' will zoom out.
Hopefully this helps!

The Superdrive on my MacBook Pro ejects audio CDsa few seconds after they are inserted. This happens with both prerecorded CDs I have bought in music stores AND with audio CDs I have recorded myself, on the very same computer, via iTunes.

The Superdrive on my MacBook Pro ejects audio CDs just a few seconds after inserting them. This happens both with original audio CDs I have bought in music stores AND with audio CDs I have recorded myself, on the very same computer, via iTunes. The same does NOT happen with data CDs (e.g., stuff in mp3 format), which are read just fine. This behaviour started a couple of weeks ago, until then everything had worked just fine for years. I am running iTunes 11.1 under Snow Leopard 10.6.8. Any idea?
Fabrizio

You could also try a SMC reset:
Resetting the SMC (System Management Controller) on Intel-based Macs:
http://support.apple.com/kb/ht3964 and
http://support.apple.com/kb/HT1237?viewlocale=en_US

Screen flashes and won't turn on, what could be broken?

Hi guys,
All of a sudden my macbook pro won't turn on anymore. I press the power button and the screen flashes for a second, the front light stays on, white, but nothing happens, no noises at all, not even the harddrive or the cpu cooler startup. I really don't know what could have happened and what I can do, could you guys help me?
The motherboard pic:
http://i41.tinypic.com/2dgt99d.jpg
Turning it on video:
http://tinypic.com/player.php?v=6ekz84&s=5
Between 1 and 2 seconds I press the power button and the screen flashes. After that I press and hold the power button to turn the light off.

My guess is that you have a hardware problem that needs repair.
You might try removing the battery and the AC power and then holding the power button down for at least 5 seconds, then replace battery and AC power and see if it will work.

MacBook Screen Flashes and Refreshes every 2 seconds after autoupdate

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