PSP Psp isn't holding a charge

[Pokemanz master]

Alright
This psp isn't holding a charge.
I tried using my pandora and a regular psp battery.
The Orange LED light would turn on.
But after that I got nothing.

The psp itself won't even turn on.

Can someone point me in the right way to fixing this. :argh:

I gotta return it to him by Sunday since hes leaving town on vacation.


Info
Psp-1000
5.50 FW (from what he told me)

 

[Adiuvo]

How long has it been like this?

 

[Pokemanz master]

How long has it been like this?

About a month or so.
I been delaying it for some time.

 

[Adiuvo]

Have you tested the battery to see if it is even capable of holding a charge via another PSP?

 

[Pokemanz master]

Yea,
I tested the battery on two others psps.
Still nothing on the broken one.
I have 4 batteries and tried them all on the non-working charge psp.

Edit- I decided to open it abit.

It seems on the button side (x,o buttons etc) seems to come up abit.
When I hold this side down the psp turns on.
There a small black switch there.
Which seems out of place.