I have had a Dell D505 for around 5 years now and it's been very stable all that time, up until this morning that is. I was using it to browse the web and all of a sudden it turned off. I haven't been able to power it on since, it has full battery and charges fine off the power adaptor. When I press the 'on' button, the power and HDD LED's will blink, but nothing more. Can any of you please give me advise? Or is my laptop broken for ever? 