My dad is a diesel mechanic and he uses a laptop as a diagnostic tool, and there two problems with it. So he brought it home to see if I could fix it. First of all when you push the power button, you can hear the fan spinning, one light comes, the one with the little lighting bolt, the power light does not come on. The fan will spin for ten seconds or so and then turn off. Sometimes it turns on right away and boots up. But most of the time it does not. So I spend 15-20 minuets pushing the power button, then I eventually boots up. I searched the hp support site for ways to fix this. It told me to reseat the memory. So I did. Nothing changed. It also to me to run a hard drive self test. I did and everything was fine. The second thing is that when logged in it just stops; it just locks up, even if IÂ’m not running a program. The hp support told me to go into the bois and set them to default. I did, nothing changed. So now IÂ’m stuck. So if anyone can help me I would greatly appreciate it.