My MP3 Player

My MP3 player was fine for the while that I had it.. All of a sudden, I couldn't turn it on.. When I did it says "Boost Error! Shutting Down!" and I've tried to format the MP3 player, I've tried to delete my music on it and nothing. When it decides to finally work, it'll only work for the first time I turn it on after charging ( even though it says I have a full battery ) and when I turn it off, it says the boost thing again. It's really starting to fustrate me because I really enjoyed having this MP3 player.. but now I can't even use it.. And yes, I have even tried to reset it a few times, and still nothing =(