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					Originally Posted by  Katie
					 
				 
				I have tried booting in safe mode, screen still blanks out. It has Vista on it. It doesn't flash or turn Amber. 
 
I will try the Ctrl F5 when I get back home and let you guys know! 
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 Been a while since I went through troubleshooting steps on a client device, but if you boot into full safe mode (no networking or anything) and it still doesn't play well I would wager that key combinations aren't going to change your success.
I'd look at the bundle of stuff you got with the computer and see if HP shipped you a proprietary hardware diagnostic disk and work through that.
EDIT: to the same tune as the reseating memory, when the screen goes black does the computer make any beeps or does a light on the device blink in any discernable pattern? Sometimes those little things are actually hardware diagnostic codes being generated at the firmware level. 
Posted from my iPhone/Mobile device