After looking up some more solutions on the web I ended up baking the logic board in the oven and that fixed it. I think it was the GPU and it needed a reflow. It was down for weeks and I’m typing this message on it now. Thank you very much for the help.
I have an A1354 and it powers up just fine. The problem is that it keeps dropping connection to airport utility on my mac every 5 seconds or so. I came here looking for a potential diagnosis/repair. I didn’t know about the battery. Could that be an issue? It has never been replaced.
I got the battery and force-touch sensor replacement kit. I put everything together and was about to put the screen back into place when I looked over and saw that I had two double-sided sticky gaskets with the Tesa name on them. They’re not mentioned in these instructions anywhere. So I took it all apart, placed the first gasket into the watch’s back channel, placed the force-touch sensor on top of that, and then placed the other gasket on top of those. Was this the correct way to do it? The watch is working but I think the glass screen is sitting a little higher than normal.