iMac 24 2008: installation froze and throw garbage display

necromac

macrumors newbie
Original poster
Apr 27, 2016
4
2
New Zealand
Hello,

I bought a used iMac 24 2008. I thought it was just a HDD issue because it does chime, it does show apple logo and it has clear display. But when I did the installation, it does progress but at some point, around 70% it just display garbage. (please see attachment.)

anyone can help me on this? any experience like this? how did you resolve the issue?
 

Attachments


ddmcnair

macrumors member
Apr 25, 2011
63
11
I looked at several iMac 2008 pictures and it appears there is a heat sink beside the memory, DOH! I would try swapping out the memory.
 

necromac

macrumors newbie
Original poster
Apr 27, 2016
4
2
New Zealand
@ddmcnair: memory? you mean RAM right? but the RAM are new... HDD is new...

@CoastalOR: I am suspecting that its the Video card. But it is wierd because before that screenshot, it display fine. i hold the Option button, and let me select my DVDROM or EFI boot USB stick, the display is vivid clear.

But when i select any mac os x installer (DVD or USB) and when it reach to 70% of loading the installer, it just crash and showing like that on the screenshot.
 

maflynn

Moderator
Staff member
May 3, 2009
63,851
30,367
Boston
Yeah, those type of symptoms tend to illustrate a failing GPU, so that would be my guess.