How do you disconnect the monitor from the rig?

[PabloW]

I've built a mining rig with my own PC back in 2011, but I'm trying to build more (for litecoin or others) and I'm not sure how to leave the rig without any monitor at all. I know how to put dummy plugs to cheat the PC of the cards being connected, but how do I dummy plug all the cards and take out the monitor to leave the cards working without having to leave the monitor conected to the rig?

Is there any special thing I need to know for this?

[Xian01]

Is there any special thing I need to know for this?

 Disconnect monitor. Acquire TightVNC. Dummy plugs are no longer required.

[PabloW]

Great =)
I'm already mining with a 7970 using cgminer, I installed a second 7970 today and it got recognized ok by CPUZ and Afterburner, but I can't get guiminer to recognize it, also I don't know how to make work the two cards with cgminer. I know it's pretty basic, but I'm kinda stuck here.
Any help would be really appreciated!

[gamefixer]

Great =)
I'm already mining with a 7970 using cgminer, I installed a second 7970 today and it got recognized ok by CPUZ and Afterburner, but I can't get guiminer to recognize it, also I don't know how to make work the two cards with cgminer. I know it's pretty basic, but I'm kinda stuck here.
Any help would be really appreciated!

FWIW, I had to put dummy plugs on the 7970's and R9 290's I bought. cgminer didnt see them otherwise.