Your deviceTCL P7K 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.
Manufacturer UI recreationTCL P7K QLED · TCL Google TV

TCL P7K QLEDTCL Google TV · 14:32
Back of the TV
HDMI 1
HDMI (ARC)
Optical audio