Monitor goes black randomly connected via 4-in-1 adapter and HDMI

[Alth]

Originally Posted by AlbanRampon

I encourage you to have a look if the behaviour is really random or depends on when someone stands-up or sit down nearby.
These chairs are notoriously bad for electronics. Here is a paper published on the subject 23 years ago. I would advise using a better shielded HDMI cable. Your cable doesn't seem long enough to be the reason for the sensitivity, if you observe the temporary blink matches the chair gas compression/decompression.

Hi, I've discovered that whenever a colleague of mine stands up from her gas lift chair, the problem will happen and the monitor will black out for a few seconds then come back on. Occurs 9 out of 10 times.. so I can presume this is indeed a case of chair ESD! Funny thing is it only happens with that particular colleague and her chair, doesn't happen with other chairs.

I've tried with another HDMI cable, the situation is better and doesnt blackout as often, but it still happens occasionally. Do you have any particular brand and model of cable that would be better shielded for my usage? As the problem can get quite disruptive to work at times.

And thanks very much for the insight and help!