5510 Flashing reading and writing O.K. But Doesnt power up. Pls Help!

[Dj King]

I got here 5510 no power. But writing and reading flash OK. After I read the flash(full), no checksum or error reasult. I put a charger but no response, even the battery indicator on the display doesnt appear. Everytime I try to read or write flash, the keypad LED's are lighting,same as 3330/3350. Pls help me guys!

Thanks.

Dj King:(