TLDR; A computer and monitor works at site A, but the exact same setup fails at site B - the only difference is the power sockets used.

I have a HDMI over ethernet box which allows me to use Cat6 cable to carry a video feed to a remote monitor.
At site A, I connected the below components, and it worked.

Desktop PC > HDMI cable > HDMI Sender > Cat6 cable > HDMI Reciever > HDMI to VGA cable > Monitor.

The PC, Sender, Reciever and Monitor are powered with UK plugs.

However, if I move the exact same components to site B, the system does not work (no monitor output).

Site B has several other systems working OK (computers, monitors etc..), and has never had any power related problems before. The PC works fine at Site B, and detects that it has a monitor connected. The Monitor works at site B when plugged in directly.

Is it plausible that the building's power at Site B is faulty in a way that allows everything to work excepting these HDMI to IP extender boxes?

  • \$\begingroup\$ Another possibility is that the box you purchased is faulty or just not well designed. Did you read the reviews before you bought it? \$\endgroup\$ – Elliot Alderson Jan 30 at 12:48
  • \$\begingroup\$ @ElliotAlderson It works reliably at site A, including when wiggling the cables (to check if they're positional) and power cycling the whole thing a few times. So that makes me want to rule out the box being faulty. \$\endgroup\$ – Jethro Jan 30 at 12:49
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    \$\begingroup\$ Site B may have a lot of EMI from other equipment. \$\endgroup\$ – Andy aka Jan 30 at 12:55
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    \$\begingroup\$ At site B, run all the equipment from the same filtered power-strip. \$\endgroup\$ – analogsystemsrf Jan 30 at 13:07
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    \$\begingroup\$ Don't assume that faulty means non-functional. Faulty can mean that a solder joint failed, making the built-in EMI filter less effective than designed. The reviews on the vendor site suggest you are not the only person to have problems with this device. \$\endgroup\$ – Elliot Alderson Jan 30 at 13:39

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