I've been having no problems with my psp ever since i first got it but when i turned it on after a few months of not playing some of the buttons wouldnt work. The select, home, brightness and lower volume buttons do not respond for me. ive tried
-replacing the ribbon cable
-disabling vsh menu
-restoring idstorage with despertar cementario v7
None of these worked so i dont know what else i can do. My firmware is gen 5.50d final. dont have a pandora or mms right now, i used hellcats tool and rains mmsmaker to change them back and forth. Any help would be greatly appreciated.