Alright I have my friends computer over at my house for the day to format his computer, reinstall windows and install his drivers/apps. Right away I'm having a problem though. I plug his computer in where my computer was and right away, nothing happens. It starts up, but nothing comes on the screen. And it starts up perfectly at his house. Usually it boots up and when it works it will beep. Now there is no beep. I don't understand how this is happening when nothing happened.. all he did was unhook his computer and reconnect it where mine was..

What's going on?? I need help with this ASAP, i need this done by tomorow.

Realllly need help with this one...