Hi.
It's a "Video Hardware Error" as specified by Windows Reliability Monitor. It causes all displays to go black, but no BSOD. Then after about one minute (or two), the Video card driver(s) recover, I have my 3 displays working and all remains ok until I disconnect a monitor (even the one connected to the second port of the internal nVidia card) or I reboot the PC. Then exactly the same thing happens.
When the problem occurs, administrative events shows hundreds if not thousands of entries identical to this:
The description for Event ID 14 from source nvlddmkm cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
\Device\Video11
CMDre 00000000 00000080 00000000 00000005 0000000c
I will do more testing later on. I'm busy right now doing work with my laptop and can't spend too much time chasing crashes; sorry.