Originally Posted by jcatcher
First thing you do is make sure that the problem is actually the hard drive and not a power supply that's going bad.
Of course it could easily be both.
Good news about the power supply is about $10 worth of replacement capacitors and some soldering and it's better than new.
Good news about the hard drive is that you can go from 160GB to 2TB for about $100, depending on who has what on sale.
I'd recommend the WD20EURS or the WD20EURX