I have a friend with a problem. He kept getting a illegal operation error while using his ISP. He called them and told them about his problem and they got him to change his video settings. When he did it locked up his computer. He had to shut it down. Now when he brings it up and it finishes running scandisk the screen goes blank. He says that he still hears it reading from the hard drive but theres nothing on the screen. He just wants to get back to where he was before he got "help" from his ISP. I suggested getting into safe mode and resetting his video but I can't remember how to get into safe mode. Am I steering him in the right direction? I know he has an HP Pavilion but I'm not sure of the model or monitor size.