HP 9730nr Blank Screen on bootup

My girlfriend was playing World of Warcraft on her HP9730nr laptop that she bought from Best Buy last year around this time (March or April) when she got some distortion on her screen, so she rebooted her PC and reinstalled her Nvidia drivers and rebooted and got as far as her login screen and things went black. She rebooted again and started in Safe Mode, uninstalled the drivers, restarted in Normal mode and the same thing. So then I told he over IM (she's was then on her Lenovo S10) to just shut down and I would look at it when I got home. So When I got home and started up, nothing but a blank black screen, I don't see the BIOS info, HP stuff, Hit F9 for this F11 for that options that use to be there.

I then went to HP's website and followed this guide ( http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00372748&cc=us&lc=en&dlc=en&product=3647034) and determined it wasn't a AC Adapter issue or a RAM issue. So I'm at a lost as what to do now.

The drivers she installed were the same drivers she had installed. She was having intermittent issues with the display drivers not working properly and getting an error message to that affect from Vista. Was wondering if anyone had any suggestions I could try. Or if failing at that was wondering about contacting support. Besides playing WoW her laptop is pretty important (thankfully her info is backed up) does HP 'fix' or replace them and how long can one expect it to take?