This is a short video I did on how to solve the problem of rear speakers not working on LG home theatres and HiFi’s.
The sound is usually OFF in the surround speakers for a reason. So the absence of sound on the rear/surround speakers does not mean that your home theater is faulty.
You don’t need to open the device because it is not faulty. The only thing you need is to use your remote control.
Press the sound effect button to a mode which will turn ON the rear and sometimes the centre speaker.
Thanks for watching and please let me know what other lg related problem is troubling you. I might be able to help