i've just tried to fix 2 psp's and they now both have a umd problem.
1st psp (bricked)
i changed the motherboard (including the wi-fi board) and all was well. the psp booted up as normal. jobs a good en. so i thought. but as soon as i put a umd in, the psp will not recognise that the umd is in the draw. the little round thingy in the bottom right hand corner of the psp doesn't come up at all and there is no noise coming from the drive. it's not the umd. i have tried it in my psp and it works fine.
2nd psp (cracked lcd screen)
changed the screen without any problems. but as soon as i put a umd in, the psp mutes itself and the little round thingy appears. but this time, the disc is spinning but will not read. i heard it could be a problem with the firmware. so i downgraded from v3.03oa-b back to v1.50 and the problem is there.
can anyone help me on these problems???