Windows (7 & Vista) laptop monitor does not come back after closing lid
You might also want to see if there is a BIOS update for your notebook. Things like what you describe can sometimes be caused by ACPI (i.e. power management) oddities that can be (and often are) fixed in BIOS.
I had the same problem when i did a clean install of windows ecently.
All i had to do was call task manager alt+ctrl+del and the screen came back.
The problem dissapeared after i did another clean install of windos 7