New HDMI cable not working - Old one OK

[GHQ]

Just installed a Bluestream MFP72 Pres Switcher in church to replace faulty Kramer unit.

Scenario:

Input 1- Socket on wall for Laptop/DVD via Kramer HDMI-Cat5 boxes

Input 2 - Socket on wall via 15m HDMI cable

Input 3 - Local PC HDMI out

Input 4 - Spare Input socket in Rack (For additional Laptop)

 

 

I thought I would buy a couple of new 5m HDMI cables to have as spares (LMS DATA C-HDMI2.0-5-X Premium High Speed 4K UHD HDMI Lead with Ethernet)

In testing, everything worked as before with the old HDMI 5m cables but failed to output a signal with these new LMS DATA ones.

Any ideas? - I can't believe the new cables are both faulty, but would be nervous about buying any more for them also not to work.

[Shez]

5m is about as long as I would go for a run of HDMI. Although you can get much longer (passive) cables, they're hit & miss - very much depending on what's connected at either end and also on the quality of the cable itself. Perhaps some more detail on what you're using them with and where they fit in with the system you've described?

Active cables are of course a different game - I've just completed a series of installs with 10m active cables that handle 4k without a problem.

[ninjadingle]

They're not active cables and you're plugging them in the wrong way round? (We've all done it!)