Hi, Ive been running into a problem lately with my nano... if I dont listen to it for a while, it will go to sleep but it wont wake back up... the only ways Ive been able to get it back are to plus it into a power outlet for a while or I can toggle the hold switch and if I have my headphones on, after a while Ill hear a click or some kind of noise.. I then can turn the hold off and it works... its really is getting annoying... Ill be listening to it and pause if for a couple mins and then its gone and I have to wait hours for it to come back on... Ive tried some diagnostics and reset it but nothings seems to work consistently... any help would be appreciated... thanks