HDMI problem I think!

[kimbo]

my problem: 4 TV's hdmi wont run but 2 TV's at a time if you try to start up 3rd tv the signal is lost to all. this system has been running great since I bought rv in 2015 I have a hdmi 4x4 matrix by cat 5e/6 box

[lynnmor]

Did you change the resolution on any of the TV’s?

[kimbo]

I did nothing

[RoaminRound]

Is your matrix box a R014-MTX-C5E-404? I am wrestling with similar issues.

It is a 4xHDMI switch, which takes 4 HDMI inputs and allows you to mix and match the output to any of 4 devices via Ethernet/cat6 cable, which you have to convert back to HDMI at the TV.

I have been spending all sorts of time trying the system out. I am beginning to think that I have some latent defects in the device.

[kimbo]

yep. same box. i'm thinking it's the box

[computerguy]

Electronics go bad. Sometime the first week most times sometimes soon thereafter.
Cables go bad too especially HDMI.
I replaced a Sony TV and soon thereafter I would get green screens on a different TV. There is this whole hand shake that HDMI must do to verify all devices that are connected.
So, first think I would do is disconnect power from ALL the TVs and all TV receiver boxes and any and all HDMI splitter devices. Then supply power and turn on the TVs. Then the HDMI splitters then finally the receiver. If that doesn't work you can try and swap out cables (probably way too hard to do. And then swap out the HDMI splitter.
In the end my HDMI splitter failed and I put in a better quality one and all has been fine for months now.