My Yepp ypt9b wont STAY off

So, yesterday suddenly, my Yepp decided it was not going to turn off. I went to shut it down, then plugged it into my PC to change the content on it, and it started up again. So I stopped the process, ejected it from the PC, and turned it off again. It stayed off for a moment, then turned back on. Since then (over 12 hours) it continuously turns back on. I let it stay on, and let the battery run out, and charged it again fully, but it still seems to keep turning back on. It is no longer being recognized by my computer (both xp and vista OS) both PCs have the samsung media studio installed - i do not know which version. I have also tried setting it to factory default. I'm not sure what to do, i can't change the files on the mp3 player if it's not being recognized, and it would be nice to turn it off and it stay off. I emailed Samsung tech support and they basically just told me that i needed the Samsung media studio installed which didn't help me at all. I suspect something is up with the powersupply, but i have no experience with mp3 players. Does anyone have any suggestions?