Hey folks, I'm having trouble with my (fat) PSP, I did as much as I could and cannot solve this problem I'm having and I hope some experts here can help me shed some light on this matter. My PSP had CFW 3.90 M33-3 installed for a while and suddenly the buttons ceased to work during FF7: Crisis Core; the volume and brightness buttons worked but the D-pad and the other buttons doesn't. Funny thing is all the buttons work in recovery mode, so, I figure I use the recovery option in the M33 firmware and fix it that way. The recovery mode didn't work for me, I kept getting "game could not be started" error so I resorted to Pandora battery which I successfully downgraded to the 1.5 firmware and the buttons worked again.
Although everything seemed to be working okay I can't edit my PSP nickname in 1.5 firmware, it goes into that keypad and quickly exits. I figure I give the CFW another try and ungraded back to 3.52 M33-4 and then some really whacky stuff happens like, the volume would mute and un-mute constantly and the volume adjust by itself then after I kept upgrading back to CFW 3.90 M33-3 the buttons stops working and I'm back to square one. Whew... that was a lot, if anyone have an idea of what's going on, I would greatly, greatly appreciate any help or advice. Thanks.
Thanks for the quick reply Staxx. Before the PSP started to act up I did not use Pandora to upgrade or downgrade, after it did start to act up I had no choice (buttons didn't work) but to use Pandora to downgrade,and I just followed one of the guides to upgrade back to CFW. Also didn't play with any settings on Pandora. I will format my flash1 drive tonight when I have time to see if that helps at all. Thanks for the help!
Alrighty, formatted Flash1 drive and it stopped the random volume problem but I still cant get into the PSP keypad on CFW 3.52 M33-4. Updated from 3.52 to 3.90 and buttons still doesn't work.