Friend of mine just bricked his slim PSP. It will turn on (green light turns on), but the screen with not even have a backlight and the recovery menu is inaccessible. I tried putting in pandora battery with the ms stick (for slim), but the PSP doesnt even turn on when I place the battery in. My phat psp does turn on however, so the battery isnt the issue.
It bricked because he tried to flash a theme.