I'm wiring an HDMI cable into the back of a wall plate - this cable then goes into the HDMI connector on the rear panel of the TV, and then the idea is that users of the public room where the TV is can come along and plug their DVD player/laptop into the wall plate via a short flying lead. Total cable length is less than 4m with the wall plate about halfway along this.
I'm using an EDIS HDMI 'fast install' wall plate, but this isn't turning out to be very fast-install - you have to cut the HDMI cable and then separate each individual wire and connect it into a spring terminal on the wall plate.
I know that I should be wiring 1-1, 2-2, 3-3 etc, and once I'd worked out that the colour coding of the wires didn't necessarily match what I was expecting, and had buzzed the connections out just to be sure I thought it would be simple. But no.
When I plug a DVD player into my newly wired wall plate, the DVD player goes into some some of safe mode, effectively closing down until I disconnect the HDMI lead, after which it resets itself and comes back on ready to play. The TV says 'no input detected'. If I bypass the wall plate and plug DVD player directly into the TV it's all fine.
I've tried this with a couple of different TV's and DVD players. I've started the wiring again from scratch using the other half of the cut HDMI cable, but with no improvement.