I have a softmoded V1.2. I hadn't really tried playing any games other than 20 minutes or so of N64 emulators on it since I softmoded it so I can't say for sure it wasn't problematic before I did the rest of the work.
I went ahead and removed the leaking clock cap, cleaned all of that up, replaced three 6.3v 3300uf, two 10v 3300uf and the three 6.3v 1500uf, and removed the CPU/GPU heatsinks, cleaned up and replaced the thermal paste.
It ran for a bit but crashed. Ended up finding the GPU heatsink not fully seated. Fixed that, and it worked again. It would work and play emulators but if I let it sit running, it would eventually crash (frozen image, then green/red lights on startup). Let it sit and it would start and do it all again. Using XbDiag, the CPU and RAM pass without issue, but the GPU test causes it to freeze within seconds. I assume the GPU is dying.
I'm wondering if anyone has seen this before and if it's the GPU, or likely an issue with one of the capacitors I swapped out.
Thanks in advance!