Laptop screen goes blank after windows logo disappears

When I boot normally into windows, the windows logo goes off and then the screen turns dark. Very little hard drive activity until you hear it load into windows after a much longer time than normal. If I go into safe mode it will work fine although there are little lines in the graphics. I can connect to the internet and run the computer normally. The video will not go to any higher than 640X480 and it was on 4bit mode. It wouldn’t go onto 16bit mode and when I try to increase the screen goes black.
Win XP
HP Pavillion DV9000T
4 gig ram
512 video
sata 6 gig 7200 rpm
Re-installed video drivers