Getting colored vertical lines on the screen of my hp pavilion dv9000. I've come across this a couple of times and was able to fix it by pc recovery. Not this time. I'm getting the virtical colored lines and then the windows start up but then the screen goes black and boot stops. Any ideas? Is it the mother board? Craig Johnson

SOURCE: Hp pavilion dv9000 wont boot,coloured lines appear no bootscreen

This is caused by burn out of the Nvidia graphics chip on the motherboard. You need a new motherboard. This is due to a design flaw (the subject of a class action against HP in the USA). I have had two motherboards fail on me in this way so far - do not expect any worthwhile support from the HP "support" people they are all in India and can hardly communicate outside of their simple repetative scripts. Its impossible to escape them - I tried communicating with head office but all you get is contact details back to the incomprehensible Indian call centre. I strongly recommend against ever purchasing from HP again.

SOURCE: HP Pavilion DV7 Display problem

How long have the colors on your display been "reversed/inverted" and looking like a negative....... Did you drop or damage the laptop in any way (sudden shock/bump)? Also, has it been allowed to overheat (if you run the laptop while it is sitting on a soft surface such as a bed, pillow, couch, etc it can allow the motherboard to overheat because it cannot get the airflow through the cooling system through the fan/vents because they are blocked). Have you checked to see if your laptop is included in the "HP Service Enhancement" program???

SOURCE: HP DV9000 won't boot up past the HP splash screen,

Hi,
I think your hard drive has failed. It keeps searching for the boot sector. The boot sector is broken so the hard drive keep starting over to search for it.

Hank

SOURCE: HP PAVILION DV9000 COMPUTER STARTS BOOTING UP AND THEN STOPS.

here is the only solution available on net:
give it a try:

http://amritbera.blogspot.com/2009/09/solved-hp-infinite-restarts.html

enjoy..

SOURCE: my hp pavilion dv9000 17 power on but see black screen

If your 9000 is under two years old, you should contact HP customer care and have unit serviced under warranty.
HP has had allot of problems with the 6000 and 9000 units and in response has offered an additional year from date of purchase.
Its worth a shut. Doesn't cost a dime.
Hope this information has helped you.