Can I assume you have a monitor plugged into the video card and it is functioning correctly? Do you have a monitor plugged in while trying to run cgminer?
Use windows 7 x64
install the latest amd graphics drivers (13.12)
Have at least 4gb system memory
Have a power supply that is more than adequate for your power needs
Under control panel - power options - set to High Performance
disable aero - set your theme to Windows Basic
Do not use an image on your desktop, under personalization set it to Solid Color black
use cgminer 3.7.2
before you launch cgminer be sure to run the following in a cmd prompt:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
sometimes you will crash on first cgminer run, so run it again
Good Luck!
EAC: ea9G6nmcMsDaxJMPM5CYuoYBaYzNhtUxH3
I have a 700 watt power supply just for the 6950
Have 4GB Ram
Monitor is plugged in and working
Will try the rest a let you know