IMac 27" flashes to white on startup, chimes, then goes to a black screen. It works fine on an external monitor. Any ideas how I can fix this?
I've got a late 2009 iMac 27". When I start it up, it chimes and makes all the normal sounds. The screen flashes white for 2 seconds, then goes black. The iMac starts up (if I use an external monitor, it works fine) but the screen remains black.
Weirdly, if I start it up on Bootcamp as a Windows machine, it flashes white, then flashes briefly a few seconds later on the Windows logo, then goes to black.
I've reformatted the hard drive and performed a clean install of Lion. I've got some Apple knowledge, so I've taken the front bezel off and checked for loose connections. Everything appears fine. All 4 diagnostic lights are on on the logic board.
I'm stumped. I don't want to splash out on a new LCD screen if it's the inverter or something else that's the problem
Any ideas welcome!
Ah. I'm not able to run the hardware test because it only works on the main screen. There's no obvious way to switch to an external monitor when AHT is running, which is ridiculous if the hardware fault concerns the screen! The problem isn't with the backlight - there is no dimmed image on the screen, it is just off.
I'll just have to use it with an external monitor, I guess - which defeats the purpose of buying an iMac!
Thanks for your help, though.
Similar Messages
-
my iphone screen has gone white with a few grey lines down the right hand side.. Has anyone any idea how I can solve this and get my screen back to normal..? Thanks
Hi tag71,
If you are having issues with the display on your iPhone, you may find the Display portion of the following article helpful:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/ts2802
Regards,
- Brenden -
All other functions work just perfectly, except for my phone. I would appreciate some tips.
Have you tried a re-set? (hold power & home until the Apple logo appears and let it re-start)
-
I recently purchased an iMac and transferred all of my documents, photos etc. from my Macbook Pro. Everything seemed fine until I opened iPhoto and now it seems as if some of my photos are distorted and squished. Does anyone know how I can fix this?
How did you move your iPhoto Library from the old Mac to your new one?
Do the following:
1 - launch iPhoto with the Command+Option keys held down to open the First Aid window. Be sure to follow the circled recommendation in the screenshot.
2 - run Option #4, Rebuild Database. -
My touch screen on my ipod Nano, Gen 6 has gone completely white. It had started going white the day before. I tried resetting it but to no avail. Does anyone know how I could fix this. Also I have 2 other ipods that I am no longer able to sync. It comes up with a message (best I can remember) something to the effect that my itunes version is not compatible with my ipod. Please help. I'm tired of buying new ipods when the new hasn't even worn off of them!!!
ThanksTry:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try another cable
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar -
I have an iMac desktop from 2009 and a brand new one, I have them connected directly, migration assistant freezes every time at the one minute mark, any idea how to fix this? it seems it has something to do with one of the profiles set up on the older computer.
Need more info. What version of OS X is on the 2009 iMac? How are you connecting them? FireWire-Thunderbolt or Ethernet?
-
Hi,
Sorry, I'm new to the community, so apologies if I'm repeating myself.
OK, so I tried to install Windows Vista onto my iMac with the disk partition. Everything was going fine and it wasn't until last minute, when it was installed that an error came up saying that this can only be done with Windows 7. After this error, I couldn't access any errors of my iMac and when I shut down and restarted my computer, it automatically logged into Windows.
So after a panic, I rang Apple Care and the lady helped me log into my apple area, delete Windows from my iMac, and all was restored.
However, now when I shut down my computer and boot it back up, I think my iMac is trying to log into Windows areas that no longer exist. It loads up a black screen and doesn't move from there. To log into my Apple area, I have to do the whole process of holding Alt immediately after I switch the power on and access the Mac drive and log in that way.
It's beginning to become a real pain and I'm paranoid this process is going to damage my computer. Any advice on how to restore logging-in back to it's former glory when I first purchased it?
ThanksSolved it. Thank you very much for that!
-
Got a white screen on my brand new iPod touch. Any ideas how to fix it?
Got a brand new iPod touch last night & as soon as I turned it on I got a white screen. It connected to iTunes fine & I did try to restore it with no luck. Any sugggestions would be appreciated!
- Try:
iOS: Not responding or does not turn on
- If not successful and you can't turn the iPod fully off, let the battery fully drain. After charging for at least an hour try the article again.
- If still problem that indicates a hardware problem and an appointment at the genius Bar of an Apple store is in order. -
hi there, i have a titanium powerbook G4 from a few years back, and when i turn it on, i get the apple starter screen withe logo and the spinning cycler, and then the blue bumper screen, and then NOTHING - please help! thank you!..."
Will it boot in Safe Mode? See What is Safe Boot, Safe Mode? (Mac OS X)
http://docs.info.apple.com/article.html?artnum=107392 Takes a while to run, but it usually "fixes" problems.
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://docs.info.apple.com/article.html?artnum=106214
Will your Mac boot using the system install DVD (or another system CD/DVD)?
Cheers, Tom -
Resently got white screen of death, and want to know how I can fix this
I was over at a friends house and my ipod dies from lack of batterie, and I plug my Ipod touch into his laptop with the USB cord and I walk away thinking everything is ok. I come back and unplug it, this white screen has come up and I'm unsure what to do next from this point. I have looked up possible solutions but this hold the power and home button restart process doesn't work for me, still more white screen. I have tryed restoring my Ipod but it says an error occured and i could not restore it to factory settings
Have you looked here:
iPod touch: Hardware troubleshooting
What was the specific error you received? See the following for different error messages.
http://support.apple.com/kb/TS3694 -
my macair won't turn on. when I try to turn it on, the white screen appears. But instead of the apple logo, there is a flashing folder that has a question mark on it. how do i fix this?
Try this.
Erase and Reinstall OS X
Note: This will delete all data on the disk. Back up important files before continuing.
Erasing and then reinstalling OS X can give you a fresh start, making your computer exactly as it was whenever you received it from Apple. This can solve various problems such as corrupt system files.
Shut down the computer by going to Apple () > Shut Down…
Select Shut Down or allow the computer to shut down automatically.
Plug in the MagSafe power adapter into a power source and then connect it to your Mac if you have not already done so.
Press the Power Button to turn on the computer.
Press and hold both the R and Command (⌘) keys on the keyboard until the Recovery partition loads.
Select Disk Utility and then choose Continue.
Select your startup disk (Macintosh HD by default) from the left.
Select the Erase tab.
Choose the Format pop-up menu and choose Mac OS Extended (Journaled), enter a name for your disk, and then click Erase.
After the disk is erased, choose Disk Utility > Quit Disk Utility.
Select Reinstall OS X and then choose Continue.
Follow the instructions.
I hope I solved your question.
Austin -
All my pictures taken at night using the flash are white and hazy, how do I fix this problem?
If you don't use the flash picture is too dark.
-
Imac starts, then chime, then apple, gear and grey screen
Have an iMac running 10.4. Turn on, chimes, then I get the apple and rotating gear and then just a grey screen. I've booted into single user mode and didn't find any issues. Ran extended hardware diagnostics and they were all ok. Disk utility does not find any permission or problems on the disk.
Ideas?
Thanks,
PamUsually means a problem with system files. Reinstall OS X:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X 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 Installer menu (Utilities menu for Tiger, Leopard or Snow Leopard.) 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. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update. -
My Macbook Pro is frozen on the login page with a white screen and only my login picture. How do I fix this? I can't turn it off and I closed it and let it charge but it's still not working. It's only 3 months old and was working perfectly fine 30min before this happened.
Hello Kierasully,
I would start your troubleshooting with the article below for issues of not being able to log in to your Mac. Start with booting up in to Safe Boot as well as resetting PRAM on your Mac. If that does not work, then verify the hard drive with booting to the Recover HD and go to Disk Utility to verify it.
Mac OS X: Gray screen appears during startup
http://support.apple.com/en-us/ts2570
Regards,
-Norm G. -
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?
http://support.apple.com/kb/TS2570 Mac OS X: Gray screen appears during startup
Maybe you are looking for
-
Incorrect contribution value after rate change in pension scheme
Hi Guys, I have come across a peculiar thing while changing the rates for the employee and employer contributions for a pension scheme. We have a pension scheme called "Opt60" which is implemented by having a recurring pre-tax deduction element. The
-
Progmatically save to password protected network folder
I am looking to save a file to a password protected network folder. I tried using the standard Write Text.vi to see if a dialog would pop up, but it did not. There is not an ftp server running on the networked computer, so I dont think that will wo
-
Does anyone else have a problem with DW CS3 displaying PNGs with 8 bit colour and no transparency? I'm seeing them corrupted whether they're made in Fireworks or Corel PhotoPaint. They display correctly in all other programmes that can view PNGs. I'v
-
On some sites ctrl-t ctrl-n do not open a new tab/window. example: youtube
On some websites (not just a c0uple but many) when I press ctrl-t to open a new tab nothing happens. Same with ctrl-n. Using the File menu works fine but not the hot keys. On most pages they work fine: on your "troubleshooting information" page it wo
-
Customizing OHJ for use in commercial application
My company is considering switching to OHJ from JavaHelp. I have converted our software to use OHJ for context sensitive help, but I have encountered some show-stopping problems - things we could do with JavaHelp we can't do with OHJ. It seems that O