My psp not turning on

I found my old psp in his box, I decided to load it to play because I missed him, but then when I loaded it for a while I decided to turn it on, but the green light on the power was on and the psp did not appear on screen, Connected, until I tried to turn it off normally but it did not work, I had to hold the power for 5 seconds to be able to turn it off, does anyone have any idea what problem this is? , Already tried with the charger connected in it without the battery but also did the same, also took the mdstick and the problem continued