Is my graphics card dead? If not, what could this be?
(17 inch, mid 2008 )
I swapped out my dead logic board (would shut off after 2 seconds) with one I purchased from ebay. The new board has the 2.6Ghz processor, with the revised (G84-603-A2) NVIDIA 8600GT 512MB.
I installed Yosemitie onto my SSD without issue. The problem came when booting the OS. Random artifacts will appear after about 10 minutes. It is hard to see in the photos, but looks like a bunch of weird purple swirls.
At this point, only the mouse can move around, but nothing else works. I have to perform a hard reset. After that, i become stuck in a Boot-Loop (with a “your computer restarted because of a problem”) message unless I leave the computer off for at least 10 more minutes. I can always boot back into the USB installer even before that 10-minute period, but start seeing pink overlaid on all my windows after a few minutes.
The difficult part is that there are no diagnostic reports or logs to refer to. On verbose boot, ‘Previous Shutdown Cause” is sometimes ‘0’, but other times ‘-128’. On Apple Hardware Test, no issues are being reported, even in the extended test mode.
Any ideas? I am going to try and test with other operating systems too.
EDIT 2: The next morning it seems to be worse as shown in the following:
I tried plugging directly into my monitor, even with the internal display cable detached.
Final edit: The graphics card is completely dead now I think.
This finally happened. Won’t boot at all: