I have a Sansa Clip 4gb. The player keeps turning on and off, off and on, until the battery is dead. I have formatted and put firmware on player and it worked for 1 hour and the problem started again.Formatted a few times . Now I cant do anything once it turns on it turns off. I have done everything Sansa has told me to do and it has not helped. Does anyone have any advice that Sansa tech support hasn't told me???????????