I have white screen no boot stuck on apple logo time bar then goes to white screen. Have no discs and no hardware test - command D does nothing. Its a early 2008 Imac running Yosemite. Ran all recovery disc repair etc two or three times, When I tried to recover the disc it was grayed out and inaccessible for a further repair. Tried reinstalling OS made no difference. Tried booting form external drive - goes past apple logo to a plain blue screen that then changes to an odd broken pixel image across the screen.
At a loss without the hardware diagnostics option I have no idea how to get access to a disc for diagnostics any ideas?
At a loss without the hardware diagnostics option I have no idea how to get access to a disc for diagnostics any ideas?