hi ya,
have you tried if the game(s) work in an other psp? So you know it is not the umd's that are broken.
If the games work on another psp then it will probably be the laser/reader or motherboard. If it is still in warenty then return it.
Check if all the other options are workin, such as music, pics internet. if the internet works then down load a demo from the playstation shop to see if the gameopaly still works. If gameplay works and you can access your memory card then the other option is to put CFW on to the psp. But i can not give you any more info regarding the CFW but a good place to start is google & youTube....
Also what psp is it? fat or slim & light as the parts are specific for both of them. so be sure befor you order!!!
For parts:
http://www.undercutter.co.uk/khxc/ccp0-catshow/Parts.html
Sometimes it is cheaper to by a second hand instead of fixing it!!!
well good luck hope the info helps
Anthony R Debie
March 2009