HP pavilion dv9500 17"screen,sold as faulty -

hp pavilion dv9500- 17 inch widescreen , 120-gb hd-dual core 1.8 amd, 2gb ram, dvdrw, card reader, webcam, win 7, This was working fine upuntil the other day it powers up but will not load up windows, just pops the windows loading page up then it goes off, the laptop and the screen stay on but windows wont load does not charge but works fine with power supply, may be quick fix for someone