Power issue, blank screen.

Hey there, I would like to start off by saying, this is NOT a brick for my PSP, a brick occurs when you are doing something with the firmware, I was simply listening to music, turned it off, then tried to turn it on later.

Okay, recently, I was using my PSP, with my 2GB memory stick duo, listening to music. I turned off my PSP, put it in my case, and then put it into my backpack. 2 hours later, I pulled it out, and tried to turn it on. The green light turns on, but the the system itself will not start up. With a brick, the green light would turn OFF after about 30 seconds, the light will stay on as long as my battery has life.

I have tried everything, except taking it apart and checking for a short, or checking for dust, mainly because I lack the tools neccessary. If there is any sort of proffessional opinion on this, I would be very happy to hear it.

Thanks!