aaand I'm more or elss back where i started

So, they actually got a comp tech sent out to me today. Yaye!
He fixed me computer and everything was back and working fine. Yaye!
About twenty minutes after he leaves it turns itself mostly off and gives me an error about air flow and cooling and a code that means something is wrong with the heat sensors. Boo!
Tech support will be sending me a new fan and yet another motherboard. Yaye!
It won't be until Monday. *sad*