How can I fix my Sony NWZ-E436F?

My sony mp3 player will not come on. I have hit the reset button but nothing. It shows connecting once its connected to the USB port or in the car connected to the car kit but once its unplugged nothing.. it does not turn on.. and even when it's plugged into the car it does not lasy long it gets hot and says the battery needs charging after abt an hour of listening and shuts off. It still downloads once connected to the computer but once it's unplugged will not turn on Please help!! I love the unit and don't want to get rid of it!!! Ugggh!!!

Micah
June 2010