Is this a bad GPU and can I still fix this?
My iMac late 2009 (2.66 GHz Core i5, model A1312 aka EMC 2374, iMac11,1) is not booting in regular mode. The screen breaks up and the boot stalls.
It boots in safe mode with some glitches (e.g., the mouse pointer has a square grid of horizontal lines).
From what I have discovered so far, this is most likely a GPU glitch. I have seen ideas like pulling out the graphics card and baking at 200°C, which strikes me as hit and miss and reballing the BGA (for which I would struggle to find a shop).
Best option would seem to be to replace the graphics card, for which I can get local help (I live far from big cities).
I did a quick scan through parts on offer at the ifixit store and most are for later models and only show compatibility for those exact models, though I also note that some later models ''should'' work on this one.
So: 2 questions:
- Is this actually a GPU problem?
- If it is, what is my best option for a replacement (including part numbers for later models that are known to work, if I can’t get an exact replacement)?
If I do go part replacement, international shipping is an inhibition on claiming on warranty or refund so it would be good to get this right first time.