LG 4k TV Failed HDMI port?

[Protec]

In my living room, I have an LG 55' 4K that I purchased and installed 16/11/2019. It's been great but this morning I went to look on the HDMI 3 input and it appeared black. HDMI 3 has my Dell Optiplex connected which is running CCTV software for the house. Since the screen was black I thought the computer was at fault. However, after rebooting the PC it stayed black so it changed the HDMI cable to HDMI 2 and the image appeared. It must be the actual port on the TV that is faulty! To confirm this, I plugged the SKY box into the faulty port and same thing again - a black screen. The TV does detect a signal but it's just a black screen. Anyone know what is could be or is my less than 6 month old TV already faulty?

[ChrisC]

It's not a C9 is it? I recently purchased one and find I occasionally have to turn the TV off and on to get the HDMIs to pick up

[Protec]

It randomly started working again. I'd guess it's a firmware issue.

[ricki]

It randomly started working again. I'd guess it's a firmware issue.

I have this on a TV of mine and I have to reduce resolution and it works. I think the laptop detects it wrong and sends a resolution the TV cannot handle just a thought

 

Richard

[Protec]

I was thinking it might be something to with resolution but the computer is left on 24/7 so should be staying at the same resolution. The Sky box too wouldn't work either when I plugged it into that port. Both devices output in 1080p max.

 

I hope this is a one off.