Check out this cool LED mod done on a PSP. This guy somehow managed to stuff bunch of LEDs inside his PSP plus it seems to move in sync with custom PSP programs.
“I wanted the board to fit snugly inside the psp so that if wanted I could keep the umd drive and not have to make any further modifications. I replaced the standard pic with an smd version to keep the whole thing nice and small (the board you see in the images is the prototype version, I’ll replace the through hole resistors with smd type in the next batch i make). I then deved up a prototype pcb with an indicator led to show which mode its in.”