I just freshly installed Rockbox the other day, and it was working fine, but then it turned off for awhile and then I tried to turn it back on but to no avail. I spent a long time trying to reset/hard reset it, but nothing worked, so I left it on the AC charger overnight, then tried it in the morning and then it worked. But then later on that day, I left it alone after stopping a song that was playing and came back to it later, and it would not turn on...I tried the same thing I did before(putting it on the AC stand and trying to start it hours later) but it won't work...help? D: