hey guys,
just a question here.. i bought my psp about 1 and half years ago from a shop in sungei wang. i think that shop sold me a non-warranty psp. my psp cannot be switch on now..sometimes very very rare.. after more than 100 attempts.. it can be turn on.. but it auto off within 1 minute.. HOW??? the battery is fine.. so what should i do. the shop is no longer there.

where can i repair it? How much?
p/s: i tried sending it to sony but they do not want to repair it. since its not from sony.