I agree with MrHappy, this seems like a hardware problem to me. If you are technically proficient, I would advise you to take it apart and carefully...
First off is your 2001 fully hackable cause the 2k psp are 50/50 if it can have a full cfw the reason I say this is because 5.03 gen that is 5.03 was...
I am currently uploading a TA-79v1 NAND for you. What you want to do is delete the old "nand-dump bin" from your memory stick and place the one I am...