Dell Latitude d830 no LCD video

I'm supposed to be fixing a video problem on a Dell Latitude d830, however, I can't find it. It has no video signal to the LCD. An external monitor works fine. It's not a backlight issue. There's no image at all. Toggling between CRT/LCD is same. The CRT stays on, nothing on the LCD. I replaced the video data cable and inverter. Anybody know where the lid actuator switch on a dell latitude d830 is? There's no magnet on the LCD frame and I can't find a mechanical switch.

 

Thanks Pete,
I looked through the manual, but haven't found it yet.

 

This is what I find at the Dell forums

http://en.community.dell.com/support-forums/laptop/default.aspx

You might tell something by changing the "what happens when I close the lid of this portable computer" settings, but be careful you don't lock yourself out of Windows.

Matt