PPSSPP causes performance issues

[[Unknown]]

It could be a wiring fault or short then. If possible, I recommend cleaning out your computer. You can use a compressed air canister. Normal dust generally won't conduct electricity, so look for anything that has gotten into the computer otherwise.

Also check for wires that are overly close to fans or capacitors. Wires are shielded to prevent "noise", but if a wire has become worn or is too close to something, it may be getting mixed signals sometimes.

Insufficient power is also possible, and cleaning dust out of fans may stabilize power output. Another thing I'll suggest: use a surge protector. If your computer has experienced a surge unprotected, it may have already caused damage. And surge protectors can also make power output more stable.

As for the broken port: see if you can disconnect it somehow. A port that is broken could cause a short or some other problem. Ideally you don't want any power running through it.

-[Unknown]