Imac won't start up shows apple and then goes white screen.

power off and on and restarted imac.  only white screen on 24 inch imac.

See if any of the suggestions in this link help:
http://support.apple.com/kb/TS2570

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    halo my BB9860 boots upto 75% and then goes white screen. i tried BBMCP by the time it detects my PIN the seek bar goes quarter unable to factory reset, BBSAK does recognize device at all. i am very helpless, please help me.

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  • IMac won't start up, can't get past the white screen

    I have an older iMac, I believe it's the g5, the white one, got it about 6 years ago or so. It was acting up recently, crashing programs, taking a long time to respond etc. I figured I just had too much stuff on my hard drive so I went out and bought an external hard drive. After I copied over a bunch of files (not everything, my music and my photos aren't backed up!) I then deleted the files I transferred from the iMac to make room. It took a very long time for the trash to empty, and then I tried to restart. It shut down but never rebooted. When I press the power button it will only get to the white screen with the gray apple and gray progress wheel. It stays like that for a minute or two with the wheel turning but barely any progress on the progress bar and then it turns off. I tried unplugging everything including the power cord but nothing works. Any ideas? Thanks.

    will it start in Single User Mode ? (Hold Command + S after hearing the chime)
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    then, still in single user, type the command   df/    followed by enter
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    if Capacity is ok- reboot as per the article; if not, post back.
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    Hello. When I connect my imac Start, as usual, comes the start signal and then the white screen with the load signal then nothing happens. What could be the problem?

    Presuming you get the chime, most of your Mac hardware is working and has passed the first part of the power-on self-test.
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  • How do i fix my ipod touch 4th gen when the apple logo appears and then a whit screen comes up and turns off and it wont charge and it wont connect to itunes

    My ipod touch 4th gen is a having a few problems with charging and turning on, my ipod comes up with the  extremely low on power symbol and then i put it into my computer and it comes up with the charging symbol then it goes to the apple logo and then onto a blank white screen and then turns off and repeats that process i have tried various things including resetting my ipod trying to connect it to itunes but it doesnt come up with anything so i cant reset it on itunes and have tried various charging devices.

    Tried it but it won't do anything all it does is make the screen do a very small flash of white and then continues doing the same thing appearing with apple logo then the white screen and off and keeps repeating that
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  • When I was editing a picture that I reposted on instagram, I hit the edit button and then a white screen appears and randomly shuts down. I have also noticed that my iPod has been crashing about every single 30 minutes!

    When I was editing a picture that I reposted on instagram, I hit the edit button and then a white screen appears and randomly shuts down. I have also noticed that my iPod has been crashing about every single 30 minutes! Please help!

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    Screen on ipod touch freezes and then goes white. Ihave restarted it and restored it but it didn't work. Anyone know what is wrong with it and how it can be fixed?

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    Woolmoon wrote:
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