I've got the following config:
Windows 7 with dual monitors on a DELL Optiplex 7020
When I'm leaving my screen for an hour or so and after I get back, the first screen refuses to "get back to work" giving me a black screen instead. My second monitor displays everything.
I found the following workaround
On my second screen, duplicate the monitor on both screen
Once done, first screen is ocassionally displaying
On the second screen, I extend the monitor to both screen
Read point 2
Repeat point 1 to 3, two more times and voilà, I have display , again ,on both screens
As I said, this is a workaround e.g. it should be temporary and the workaround costs me time (10 to 15 mn to warm up my screen)
I parsed the internet but found nothing relevant so far.
My question is the following:
Have you seen soemthing similar and if yes, how did you fix the issue?
Maybe it is the cable but I'm unsure of that.
Any hints or ideas are more than welcomed
Update 1: I ask my colleague for some help. We changed the frequency, but to no avail...
Update 2: I unplugged the HDMI cable and replug it to another HDMI port. The screen started...without any delay, just like that
Update 3: The long night sleep is the Test. It did not work out. What I have done so far: Update the 2 screens drivers, update the video drivers but the PC said they were already brand new. It does not seem to be the cable. We don't have a spare one, this is the issue.