Sound bar model CHT940X not working with LG HDTV

Main board is toast. Replace that one.

LG TV - LG Blu-Ray = HDMI (any except 1 if using below)
LG TV - Sound bar = Digital Optical Audio or HDMI 1 or Headphone (depending on your TV Audio out ports.)
LG TV - Dish STB = HDMI

Has the sound bar got scart sockets ? If so try connection by scart to scart see if that works

trade your TV or Sound bar to something that is compatible. IE Make it work, No optical port find a sound bar that works with RCA, Make certin you have RCA audio outputs on your tv, if you want the sound bar than New TV

Make sure red glow is coming from TV's Opt out cable when TV is on. If it is, it is working. The best solution is use an LG soundbar with an LG TV. There is a differnce in digital outputs and with a "service remote" (used by authorized LG servicers) you might be able to change the TVs factory setting to make the vizio soundbar work. but I think you'll be better off with the LG soundbar.

Make sure you are sending the audio out to the correct port using the audio section of the setup menu for the TV

I live in Israel and have the same problem with my lg 3520
Very disapointed , no salutation online..

the details you provided were very vague, however from my experience when a device is connected to another device via and audio capable hdmi cable, that device renders it audio output to the device its connected to and normally turn off all other audio outputs beside optical- I would assume there is an option in the blue ray player to turn off hdmi audio, which will in turn activate other audio outputs- you may also look for audio out port on your tv, it is ideal to connect the sound bar directly to the tv set audio out ports. To sum this up,
if you plan to use your player via hdmi cable you need to turn off hdmi audio output on the blue ray player and the plug an audio cable from your blue-ray player to your sound bar
you may also as i said connect your sound bar directly to your tv, the issue is most tv sets now a days do not have an audio out port, if you do then everything you play thru your tv will have audio via sound bar
there are several way to go here but unless your sound bar has hdmi av switching capabilities (im sure not) this is one of the most simple--Good Luck.

With out a model number of your unit I can't be of perfect help, but I believe your set does not have an audio output. The only way you will be able to use the sound bar is to run the audio from your cable or sat box to the sound bar.

Does it work via component or in a different HDMI port? If it does it sounds like either a bad HDMI input on the tv or a bad HDMI output on the receiver.

I would also verify that the receiver is 100% compliant with the HDMI standard as not all devices are.