Turned on iMac, I get white screen
Turning on my Mac and after the initial apple logo goes away, it looks like the screen start to change, and goes to another white screen. I can see my mouse arrow, but nothing else. What happened, and how can I fix it?
Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.
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21" iMac getting white screen and does not boot up
Hi All!
This is my first time to post here but have been using Mac OS since 2009.
I am having issues with my Mid 2011 iMac 21". I keep getting a white screen and it does not boot up.
I am a bit technical so I have done all the necessary steps as below:
1. Powercycle the system (Shutdown, unplug for 10 seconds and replug) = No go
2. Reset NVRAM several times = No go
3. Went to Safe Boot = Vertical white stripes on blue screen appears
4. Tried booting on Recovery Disk = Vertical white stripes on blue screen appears
I'm thinking my video card is faulty now.
Any help guys? I hope my hard drive is not fried
What's worse, my 3 year extended warranty just expired last June and it's only been 3 monthsFirst i can't send it back becuase it didnt have a warranty i purchased it on ebay. second the guy didnt send the install disks with it as he promised i have tried to follow up with him with no luck so hes been reported to ebay. and due to current buisiness expenses cant afford the new software. is there anything else i can do to at least boot the thing so i can figure out whats wrong with it. and has anybody experienced this before and if so how was the issue resolved. soooo frustrated as buisiness is at a stand still till this machine works. p.s.it has osx leopard latest version.
Message was edited by: AMILLIANZE -
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When I turn on my iPhone I get a white screen. The apple shows but when the lock screen should show that's when I get a white screen. I have tried the home power holding thing does not work. Please help
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I found some steps you can take when your iPhone is not recognized by iTunes when in Recovery Mode. I recommend reviewing the steps in the section titled "If the device is not recognized while in Recovery Mode" under step 5 in the following article:
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
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Best,
Sheila M. -
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The computer restarted gave the startup chime and stayed at a blank white screen. No spinning sprocket.
I am using a usb keyboard and usb mouse.
The only boot keyboard command that works is command+option+p+r and when I do that I get the chime and a reboot.
I've tried resetting the SMC by unpluggin it.
I've tried inserting a disk warrior cd to boot off of it, but it doesn't boot. And holding the mouse button on startup does not eject the CD.
I've tried holding c when booting to boot of the CD drive.
I've tried holding option when starting. I've connected my own bootable USB backup and held "option" when starting.
I've tried holding shift when starting. I've tried command+r when starting.
Nothing happens. I always get the chime and then a white screen.
Looking online, it looked like several macbook air/pro owners with a similiar problem disconnected their HDD and then were able to boot off an external source. So I took off the glass and LCD and disconnected the 3 hdd connectors, put the screen on and tried booting again using all the steps above and every time always the same, a chime and then white screen.
I took all the ram out and when it was turned on got a low intermitent beep and black screen. Put the ram back in and get the startup chime and white screen.
I'm at a loss as to what else to try. I can't see how booting off my friend's external usb hdd would lead to this.
Any suggestions.I reopened the imac, removed the optical drive (hdd was already out). Restarted with my USB external HDD connected, nothing happened, white screen still. I then reconnected the friend's USB HDD also and restarted and got the screen to choose a startup disk.
Computer then boots fine from my external hdd. Turn it off, reinstall my HDD and optical drive.
Turn it on again and am greeting with the same blank white screen again.
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Today i turn on the imac and it wont start, i get the white screen with the logo. I´ve triied almost everything...
Change disc permissions
Veryfy disc
Restart on safe mode
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Please help!Try booting from your install disc again. Make sure that error was corrected.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
(In Mac OS X 10.4 or later, you must select your language first from the installer menu)
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Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your startup disk and click Restart
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