Recently my NW-A3000 started to lag. It just freezes, not responds (except the reset button), it is hard to turn it on, it turns on only after the reset button is pressed a few times. Basically, it is impossible to listen to this player now. Any ideas on the problem? What should I do? Don't tell me about warranty, I don't have it, and I'm afraid, that repairing the unit would cost a lot. So, is there anything I could do myself, shoul I take it to repair or should I look to another player?