HP Pavilion dv4 Laptop Video

I have an HP Pavilion dv4 Laptop where the screen suddenly went blank. I connected an external monitor and both screens had video. I disconnected the external monitor and the laptop lcd stayed on until I rebooted. The I was back to a blank screen again. Sometime it will work with the external monitor and sometimes is won't but when it does both the external and the lcd will work. I have checked the RAM and it is good. When I have had the system running I checked the power settings and they are normal. Any suggestions as to what might be failing on this laptop?

Thank you!

Robert
Robert EhingerIT specialistAsked:
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cwstad2Connect With a Mentor Commented:
Sounds like a potential motherboard issue. is the device still under warranty? is it similar to this?

http://www.youtube.com/watch?v=UDYWFyD04xs
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nobusCommented:
ihad several DV6,7 and 9 with video problems
in all cases, i had to reflow the video chip -  and it has worked on all
if you need specifics on how to do it, just ask
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