Your deviceTCL P8K QLED
Step 1 of 425%
What to do now
Find the ARC or eARC socket
Look at the HDMI sockets on the back of the television and find the one marked ARC or eARC.
Device-matched visualTCL P8K QLED · TCL Google TV

TCL P8K QLEDTCL Google TV · 14:32
Back of the TV
HDMI 1
HDMI (ARC)
Optical audio