well i have been having this problem for a while no. it started when i was in version 3.03 oe-c and i was playing iso and i decided put my psp to sleep and after a 30 mins i wanted to start playing again and i tried to turn it on but it wont turn on. the memory card is not reading and the power light does not light.. i ddnt use my psp for about a week and after that it turn on again and i was very happy and i can play again. then after a week or so the problem occured again. i noticed that my battery status would always say that it is using external battery even if the charger is not connected.. i have upgraded to 3.40 but the problem still occurs. what should i do to fix it? does anyone know.
p.s tried a new battery but still the same.. and my battery works in other psp.