I have a pc with a AMD E6760 graphics, 6 outputs, 5 are in use. All monitors have been checked with other hardware confirmed to be working fine.

The pc was running fine until after a reboot, at this time only 1 monitor was being detected. After the next reboot nothing appeared on any screen. Any number of reboots, un plugging replugging didn't change this.

I attempt to login via VNC and I get this

I had logged in via VNC the day before - and was fine. I can login via RDP and I think because it creates it's own graphics adapter etc this is the reason this works.

I uninstalled the graphics drivers, and after this I get a generic single monitor appearing via vnc, but this doesn't output to any of the graphics outputs so still not detecting monitors. Reinstalling the drivers results in the same as the pic and no output...

This has now happened on two PC's (identical hardware)

They are running Windows 7 64bit.