Left shoulder button not working


First of all, I'm using a PSP2000 with 5.03 Prometheus through Kxploit. This issue started soon after I started using the Kxploit instead of the MHUSpeed3

It's been a few days since my L button stopped working. At first I thought it might be a hardware problem, but when I opened up my PSP, I found nothing wrong, everything looked perfect, which makes me think that it is possible that something might have corrupted my firmware.

I don't know if something like this is possible, corrupted firmware stopping buttons from working, but right now I don't see any other possibilities.

First I thought of updating my firmware to 6.20-TN, but I'm afraid of bricking my PSP, then I thought of "reinstalling" the 5.03 OFW, but couldn't find anything on this subject.

For now I want to focus on simple solutions that I can reverse easily, unless someone has a better idea.

I guess that if software solutions don't work, I'll try replacing the keystroke conductors.

EDIT: It's worth noting that MHUSpeed stopped working after I started using the Kxploit. I have tried using it with a fully charged battery and a full reset on my PSP with no luck. I always got it working on my first try, but now it won't work at all.
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