I have a Radeon HD 7850 (2048 Mb) on a Asus P6T SE mother board with an Intel Core i7 firstname.lastname@example.org Ghz processor and 16GB ram. I have a dual monitor system with 2 LG E2242 analog monitors: one plugged to the VGA port (with adapter) and another to the DVI port (with an adapter too). It's running Windows 7 x64.
Everything worked fine until yesterday night. :-(
I leaved the machine rendering (as mentioned, yesterday night) with both monitors switched off and this morning, when I tried to swith them on, the secondary monitor gave up working properly... :-(
Windows (extended) desktop seemed to be ok, but the secondary monitor was all black.
Even now, Windows recognizes there are two LG monitors (that's ok) but the secondary one just displays in black! No desktop there!
I tried to re-install the drivers, re-switch the monitors, re-cable them and with the VGA port each one works, so monitors are not the problem!
When everything was ok, when I booted the system, I saw both monitors at the same time displaying the same boot information until windows extended desktop was showed up. This doesn't happen now.
Now, the main display works fine and the secondary one is always black.
Any idea on how can i fix this?
Thanks in advance!