PSP Go brick that could be saved!

My psp go just got bricked by installing a software for changing xmb.I just started the program but psp go was black screen.Tried to plug out the battery,doing the combos for restoring it to default by pressing R+0+start or even more.The cool fact is that the psp is charging and the led it's working but I don't know from where comes the problem.Processor,video card,or internal memory wich I installed it there.If I could go into the internal memory to delete that....Please help me ! :(