LG 42LB5600 TV controls do not work

I'm not sure about specifics, but wouldn't it be easier to get a soundbar that works with your TV? For example, I have an LG TV with an LG SB+Sub combo and the TV controls the power on/off of the speakers and also the volume through an optical connection.

LG's HDMI support is notoriously unstable, not sure if it is the way they handshake or whether their software is poor but it is a long standing complaint you can find in many places on the internet.

Xbox 360 had issues with LG TV's as well (do a web search for xbox one lg tv hdmi and you'll get pages of results including PlayStation issues connecting to LG TV's so not limited to Microsoft).

Things to try:

On your TV that it works with, set your Xbox One to a lower resolution i.e. 720p then plug it in to the LG TV and see if it works.

Check for a TV firmware update

Reset TV to factory default settings

Try other HDMI cables

Try a HDMI to AV converter for your sister's TV and use AV cables with your Xbox One when using that TV.

Mine is doing the same thing but my TV is a LG. I also checked with the phone camera for the IR blast during and after TV setup. During TV control setup I get the IR blast for mute and volume up and it controls the tv. But after setup just sitting on the
new NXOE build I do not get the IR blast for the Mute or and volume commands and every other IR blast command works that I tried besides those.

Hello DonC72,

I regret to say I do not have any direct experience with LG 4K TVs. However, the first thing I would suggest is to confirm that the Xbox can control your TV. Go to >Settings >All Settings >TV & OneGuide and select
Device control. Under DEVICES select TV (it may already display LG). Under TV select
TV setup. At this point your Xbox will probability say "Your TV has been set up", but select
Enter it manually. Under What brand is your TV? Select and choose
LG, and click Next. The Xbox will display "Do you want to be guided through TV setup, or do you want to enter the model your?" select
Guide me. At which point the Xbox will take you step-by-step and send codes to your LG TV to turn things on and off like MUTE, VOLUME, MENU and DISPLAY. If all this works, then we know the Xbox can control your LG 4K TV. If not, then this maybe
an issue where you need to be "Using IR extension cables with Xbox One" . Note, that depending on your equipment and installation it can take some time
after the Xbox boots up before it can turn everything on.

support.xbox.com/en-US/xbox-one/live-tv/use-external-ir-with-xbox-one

Good luck and good gaming,

SA

No changes or updates to my system sadly. Only change was from one tv to the other tv. This first started happening a week ago. I had it linked upto the LG tv, then the screen just went blank, and hasnt worked since on the LG tv. But as stated it works
fine on the Samsung tv.

Also it will not work via the AV/Scart cable on the LG, only via the composite cable. Luckily my tv supports all of the above methods for connection.