psp go and psp 3003 help

[xblade]

hi im tring to fix a psp go i can see the icons on the screen but no light on it,, what could be wrong with it ???

and my psp 3003 red wont play umds,, its had a new screen in it there and now it wont play umds,, i have put a new lens and all in it and checked everything on the doard was working be4 the new screen was put in by a shop

[JTH]

[ame=http://www.youtube.com/watch?v=8MLfoIwj8nQ&feature=player_embedded]YouTube - How to install 6.35 PRO-B[/ame]

[antonfar86]

Salve,
ho comprato una psp go con firmware 6.35 e vorrei sapere se ? possibile effettuare la modifica