Won't power on GPU fault?
I recently began fixing an iMac a1255 the first 2 diagnostic LEDs turn on but unfortunately the other 2 fail I presume it would be a GPU fault but was wondering if there were other troubleshooting steps to take
Update (05/09/24)
Update iMac was left sitting around till I sourced a CPU to try came to install first I tried powering it up before replacing but now only got diagnostic lights was working yesterday and nothing was done
Update (05/15/24)
Update got new ram and received error lights again but nothing else swapped CPU but no change till the morning when it booted up a few times but then it got stuck at a white screen and then multi coloured lines as well GPU ? Thanks in advance
Ist dies eine gute Frage?