I have the same issue with my psp3001. I think the CMOS Battery is Depleted /Dead after many years of use from the date of manufacture up to present. i’ve seen some videos with this psp problem, they Heat the Power IC with hot air ,remove the CMOS battery, charge it manually then solder it back to the PSP Motherboard and it worked. Or you can get these batteries from a dead psp motherboard .But I never tried this. Or you can Try This … Works for me All the time 1>>Power your PSP with the original charger(or a powerbank in my case) and play continuously for 30-45mins without the battery. 2>>After playing for 30-45mins , Power off & Disconnect the charger or power bank 3>> Insert any working battery . AS FAST AS YOU CAN, you dont want to lose that residual charge on the motherboard . In My Case i use a MODED Battery With An Original PCB Taken from the Original PSP Battery. Check the update portion below. 4>>Power On. Voila !! [ z ] UPDATE 10/19/21 Still Works ! 100 % UPDATE 02/11/21 My psp3001 works fine...