Hi Kenneth and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model numbers of the LG and the Panasonic. Additionally, please describe how the LG is connected to the TV using what kind of cable(s).
Still, is this a fresh/new install? ...or has the pair been working before as expected and this issue just recent?