Monitor Flashes Blue/Green/Grey Artifacts [Fixed]

[philosofool]

I just got a new monitor, a Pixio px277h. It's a new model from pixio, promising 27", 1440p, IPS, 144Hz, freesync. Their past products have receive very good reviews in terms of dollar/spec.

Sadly, mine flashes weirdly. It doesn't go black, rather, the screen flashes bars of color and other weird artifacts. This happens only over the 144Hz ports (the HDMI 2 and DP, but not the HDMI 1.4 that's rated at 75Hz.) I'm hoping that someone might be able to identify a possible cause that I can fix. RMA = birthday bummer + hassle. (I haven't tossed my old 1080 TN panel yet, though.)

What I have tried:
-Both HDMI ports on my graphics card (an MSI RX 480).
-A DP port.
-Pushing the cables in nice an tight
-Three different HDMI cables, including the included one that's supposed to be an "HDMI 2.0" cable.
-Lowering the refresh rate on the port, though AMD's mediocre crimson or adrenalin or whatever they call it ware makes me uncertain whether it actually did that.
-Running it at non-native resolution (1080p)--obviously, not as a permanent solution, but just to see if it persisted at lower bandwidth.
-Radeon firmware updates.
-Turning off or on (and usually back off and back on again) features in the monitor menu that seem like they might cause/elminate the issue.

Is it RMA time, or does someone know a secret switch somewhere that makes monitors do this?27"

 

[philosofool]

Fixed, I think. (It was sorta intermittent, but happened enough that I think I'd know by now if I hadn't fixed it.)

The problem went away after disconnecting an HDMI cord that was in another HDMI port in the graphics card. It didn't occur to me to check a cord that led to nowhere (I sometimes connect it to a TV, but not persistently) until I thought about trying an older video card to see if my video card was the problem. So, the problem was with the video card and had nothing really to do with the monitor.

Thanks to anyone who puzzled about this.

 

[Tweak155]

Interesting, thanks for the follow up... you never know sometimes what might be causing your issue.

I had something similar when I was a support tech for a major movie theater chain... this one location had all their terminals popping online and offline randomly. It turned out to be a damaged network cable that caused some madness... removed one cable and every other station was fine after that.