MacBook pro 15 inch random shutdowns

I installed macOS Ventura on a working 15 inch 2011 MacBook pro. During the install there were multiple times where the laptop would fail to restart, and boot to a black screen. Its now persisting to the rest of the laptop, where it either fails to shutdown, fails to restart, or fails to POST, and gets stuck at a black screen. Any idea what kind of fault this is? I don't think it's the gpu, since it ran fine with switching graphics disabled.

Thanks!

submitted by /u/Gubba_Monster
[link] [comments]