NO VIDEO

sounds like a bad or broken lcd inverter
board. it takes the signal from the mobo
and sends it to the screen.
Should be located in the display hinge
or next to the mobo.
Replacements easy to find

I've been pondering this for awhile but I think sandrew is on the right track:

-Probably not the LCD unless you were sold a lemon.
-Onboard video circuitry is working with external monitor so that?s not it.

Assuming a hard fall I'm more inclined to think that there is damage to or around the connector that the LCD plugs into. Could be a busted solder joint, cracked connector or a damaged printed circuit run near it but I think that?s where you should start looking.

It must be an integrated graphics problem, probably due to a damaged board.

if you have the correct drivers for the graphics, cant see it being anything else, although most people posting seem to have the same problem, it maybe something that has to be set up in the bios, but as we well know manufacturers only allow changes the simplest bios options, others are hidden.

Does the external monitor have the ability to change the resolution or is it just VGA mode, if it does then the drivers are fine, it's an lcd setup problem.

I am having exactly the same problem with my fujitsu siemens lifebook. There was a hard fall going through spanish customs. Will try the solution.