I own a DELL Pocket DJ 5 GB MP3 player and have replaced the battery because the battery didn't seem to take a charge. After replacing the battery and plugging in the USB cable the Pocket DJ turns on and after awhile the window goes blank and show nothing. When I first got the Pocket DJ and I would plug in the USB cable it would show the battery symbol and it would charge. I need information to what needs to be done to fix this problem any help would be much appreicated, Thanks, Bob