Facing TV Problems? Ask a TV Technician.
Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, bear with us; re-confirm and post back with the complete model number of the "...LG SMART TV..."
Is the TV directly connected to ana ntenna or cable feed? ...or is there a cable box used with it?
Additionally, please describe how the SA-HT05 is connected to the TV using what kind of cable(s).
To my understanding, the 43UF6430 does not have analog audio output that can be directly connected to the SA-HT05's RCA jacks.
As an alternative, does the DirecTV receiver have a pair of red & white RCA jacks labeled as R & L AUDIO OUT ?
Appreciate the additional information.
Would you consider / can you please try connecting the DirecTV receiver's red & white RCA jacks / R & L AUDIO OUT to the Panasonic's red & white RCA jacks marked as CD IN or even TV IN using a pair of RCA-to-RCA cables ?
If available, a coupler may be used to extend. Please click / tap HERE.
Or use a longer RCA-to-RCA cable similar to the product HERE.
Glad that the above information served your purpose.
This would be the simplest and fail proof connection method.
Good luck and thank you too for the opportunity to share the information.