I usd my "lovely" Dell Axim X51V

for about 2 years, but recently it had some problem, It got no respone when i press start button, or sometime just "hang" when i was using it, after i soft reset n it getting ok. but today when i try to on, i found my LOCK button get loose, i still can on it but no response when i press any button or screen. Anyone can help???:rolling: