Lately with the display port on video card I met a serios problem because of display port to dvi converter. If computer goes to standby/sleep the monitors don’t wake up. Its have just the red LED openned and nothing happend when you restart the computer.
After I read some documentation I found that standard dp to dvi converter which is a passive one and doesn’t recognize when monitors go to sleep and it thinks that monitors are turned off.
The fast solution is to unplug the monitors from power source and reconnect again after 30 seconds and the “long term” solutions are:
1. to buy an active converter which has compatible electrical parts with the display port.
2. Go to Control Panel - on Balanced (recommended) click on Change plan settings and change the Turn of display option to never.
Have a nice day!