Can I use a Laptop as a secondary Monitor?

[Caveman]

I need to keep my primary rig going but I need it's monitor for the new rig... Can I just use the video capability of the Laptop and pump the video signal from the primary desktop to the laptop screen?

 

[halfadder]

I don't know of a hardware solution (laptops generally use LVDS video internally, not DVI). But I suppose you could use remote desktop to control your primary rig from your laptop (or your new rig for that matter)

 

[imported_Phil]

I take that back.

 

[SeTeS]

Yes you can. Check out this proggy called Maxivista. Works surprisingly well. Connect the computers over a lan, install on pc and laptop. The laptop will show up as a secondary display device on the primary pc.