When I got a new desktop computer I ran into issues with DisplayPort. My screens worked just fine (even in UHD, albeit at only 30Hz.) with the DVI cables, but when I’d hook them up with DisplayPort cables, I’d get a ‘No signal’. For some reason, this only occurred with 3rd party DP-cables. The cable which came with the screen did work but was too short for my needs.
The 1st set of 3rd party cables I returned because I thought they were defective. As a replacement, I ordered 2 different DP-cables. When both of those didn’t work for me either, I resorted to Google for answers. And that’s how I found the solution: Unplug your screens for a minute from the mains! (Merely turning them off/on won’t do the trick. Apparently, there’s one/more capacitor(s) which needs to fully discharge.
Since I don’t want to go through the hassle of physically unplugging my screens between use, I enabled the EcoControl feature on the UPS to which the PC is connected. As soon as it notices the PC (master) is switched off, it cuts the electricity to the screens (slaves).
After I did this I haven’t had any problems any more with my displays.
No guarantee this will work for you if you experience ‘no signal’, but it’s worth a try 😎
|PC||Dell Alienware Area-51 R2|
|GPU||NVIDIA® GeForce GTX 980|
|UPS||Eaton Ellipse ECO 1200 DIN|