Getting ‘No signal’ on your DisplayPort? Here’s a fix

DisplayPort-logoWhen 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 😎

My hardware:

PCDell Alienware Area-51 R2
displayAOC U2868PQU
UPSEaton Ellipse ECO 1200 DIN

64 thoughts on “Getting ‘No signal’ on your DisplayPort? Here’s a fix”

  1. Pingback: no hay señal dp de su dispositivo - Portal Login - Your login web pages

  2. What the actual ****. This worked for me after my monitor suddenly stopped working on DP. How’d you find out and why does this solve it?

  3. I’ve had this issue for months, to which it happens once every week or so. I had firstly thought it was faulty cables and kept trying different variations.
    I tried this one time and it worked perfectly… I wish I knew sooner! I had tried switching the monitor off for a while and even unplugging the power from the monitor ONLY, however not unplugging the mains from the wall, which does work.
    I have the AOC U2868PQU 28″ 4K monitor and an NVIDIA GeForce GTX 980.
    Thank you for the fix!

  4. So dumb that this is still a problem 2 years later. Solved it though.
    notes for my system had this problem with my new GTX1080 and my monitor was a benq 2420pt.
    turned them off at the wall for 2 minutes back on worked straight away

  5. Thank you so much for this solution i tried everything but did not expect killing the power would work but it did so thanks again for this solution.

    1. Just wanted to note that my GPU is an older NVidea GeForce GTX 960, Windows 10, Dell monitor set to 2560 x 1440.

  6. Brilliant! Worked perfectly. Now I wonder what I did to set it off. No problems since I bought it years ago.

  7. worked on my AOC2770G4 monitor with my Nvidia GeForce GTX 760. Just unplugged my monitor for a minute and boom, back to 144hz DP ooohhh yeah. Spent 20mins trying different things before resorting to some googling

    thanks very much OP

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