monitor is blank on startup

my video card (asus ti4200) was giving me problems by displaying pixelated glitches on screen. in diagnosing the problem, which i later found to be a bad fan on the video card, i changed the video settings in my bios from pci to agp. it is an agp video card, so i figured that the settings were wrong and it needed to be agp instead. i guess i was wrong because after i saved the changes and exited i was faced with a blank screen. now i understand that by making changes to the bios i have caused there to be no display and have tried restoring the defaults to the bios. But, i'm doing this blind and i just cant get it after numerous tries.  In case your wondering, it's an HP XL766, and hp.com suggests waiting till the lights on the keyboard light up and press F1, wait 5 sec., press F5 to restore bios defaults, wait 5 sec., and finally pressing F10 to save and exit the bios. Now this SHOULD work, however, i've had no luck. So now to my question: Is there another way of restoring the defaults to the bios, maybe by unplugging jumpers or pulling the battery out? I feel like I need to be really sure before doing something like that. Any help would be much appreciated.
jdennis4486Asked:
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woodendudeConnect With a Mentor Commented:
clearing the cmos wil reset the bios values to default, remove your cmos battery for 15-20 minutes, replace and reboot. You may be stopped in the POST screen and prompted to press F1 or another key to set BIOS defaults. Do so, and from the BIOS screen, save and exit to load your computer normally.
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jdennis4486Author Commented:
ok let me try that. thanks for responding
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jdennis4486Author Commented:
you're so awesome. thanks so much, that was driving me crazy. your help is much appreciated.
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woodendudeCommented:
Glad I could help.
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