Ok, I've got my girlfriends 1.5ghz 15" powerbook g4
It's hard drive failed once and was replaced. (possibly more I'm not sure i wasn't around then )
Right before it's warranty was up I had it sent in through GSX and got the lcd, keyboard, logic board, and hard drive replaced. Not sure why they replaced the hard drive. Anyways, It came back and it would randomly, but constantly freeze up and do the spinning wheel. I thought it just needed a reinstall but after the first one got messed up (it was going slow and I accidentally unplugged the firewire) it couldn't find the hard drive again. I tried to repartition but disk utility couldn't recognize it.
Although the warranty was now over I sent it back into Apple and all they did was replace the hard drive again(It took about 3 weeks). It came back and about a week or two later did the same thing. It would freeze up and do the spinning wheel on just about anything. The hard drive then slowly stopped being detected. I'm currently trying to get Apple to replace the whole thing but I'm not personally doing it so I don't think it's going to well. I'm just wondering what might be causing it so if apple isn't any help I can try to fix it myself.
I'm guessing maybe the logic board is bad? or hopefully it's just the cable that connects the hard drive?