My LG webOS TV was diagnosed with a busted Main Board. The local service center replaced it. After replacing with a new main board some problems were observed;
1. It will shut-off and switch back on a minute after switching on. Sometimes after 2 minutes it will switch-off and back.
2. HDMI1 and HDMI2 ARC is not working anymore.
3. It cannot connect to WIFI anymore also.
Is their a way to make it work again?