P360 problem...any help?

I know everyone using a te now. But im still using a old custom mas with a psx board modded to it. My question is, my stick randomnly stop working or gets really bad input lag randomnly. Buttons all work no problem. I cant figure out whether its the 5v trace or the ground trace and whether its to the board or the stick.

Any ideas on how to test it or what could be causing it?


Need clear and in-focus photos of the inside3 and wiring

psx doesn’t run on a 5v line though, it runs on a 3.7 if i remember right