Got a PSP...You go to turn it on nothing comes on but the little green light after a few seconds it turns off automatically??? Never been dropped or nothing...

First you have to take out the battery and use charger to turned on and when it turn on just put on the battery or take out the battery and wait for minutes then put it on and tur on,if that doesn't work when you turn on just hold R and start or repair it

When you switch the PSP on -- do you get a green light for a few seconds that goes back off? Or no green light at all?

Hi first i will say sorry for that. I will recommend that you see a certified technician to fix it up, there are a few things i guess are wrong with your psp... the system of psp are fragile and should be handled with care because i think one or more parts are broken and need replacement. Cheers

It sounds like the firmware is corrupt. You will have to reflash it using a pandora battery and "magic memory stick". You can get one here.

open it and and make sure all the outlet things are all plugged in one of mine was a little out

actually your psp has been bricked so you have to buy a pandora kit for 24..75 us dollars you can make your own pandora kit or just open this li to youtube http://www.youtube.com/watch?v=qoCD7WuZZ0o

Push the power button up and hold it there for a few seconds then turn it on

Inside the psp is a very small ribbon cable that connects your screen to a printed circuit board. Sounds to me like you most likely need to reinsert that cable to get your screen back up. If you open it...be absolutely certain you know what you are doing! Most connections are very small and you will need jewelers screwdrivers to open it. Otherwise bring it in for repair.
Best Luck.

It seems that inside your PSP the LCD Screen Connection cable (The broad One) which is connected to the motherboard is being loose contact so if you can open the PSP try it by re-fixing the cable again otherwise you better go for a technician who will do the same job for you.

Have you tried ejecting your battery pack? I've had a problem like this. But I don't recall the green light coming on for 15 seconds. Anyway, try ejecting the battery pack and putting it back in. If that doesn't work, then... I tried.