u/DusteSenpai

Just wondering if anyone had this problem and was able to address it. So I've got a PSP2002, and it doesn't power on at all. This is all I have tried and I get nothing, not even a light nor sound.
I tried taking out the battery and connecting the power plug directly
Replaced the motherboard
Replaced the power switch board

Is there anything else that I can do? Not really tech-savvy but at least I can try.