My USB controllers have failed on my xw6400 workstation at work. And the tech support at HP (which surprisingly wasn't so bad) have deemed the motherboard needs to be replaced. I usually do this kind of thing myself (video card, hard drive, more simple stuff) But a motherboard seems much more complicated and over my head. So I requested to have on-site replacement. They are supposed to send a tech out with the motherboard hopefully soon. I know they usually (or probably) contract this shit out. When I'm watching over their shoulder what should I keep an eye on so they do it correctly and not fuck my beloved workstation up? I suppose it would probably be a good idea to back my shit up just in case they really do fuck up my system.