$150 to replace a hard disk? That's called stealing IMHO. You can do it in a couple of minutes. 2 cables to plug in and a couple of screws and you're done.

>Thank you both Al & William. He went into some repair shop yesterday and they detected a bad hard drive and said they are going to replace it for $400 (250 for 80GB drive and $150 for work). Sounds like too expansive to us, so we may want to try your advices first.