Service Menu Panasonic CT-G2159E
Turn on TV and using the remote control.
Step 1) Select the SET-UP in the main menu and then select the mode CABLE the option ANTENA.

Step 2) Select TIMER icon and set the timer sleep active 30 second.
Step 3) Press ACTION twice to exit the menu and tune to the channel at 124.
Step 4) Adjust the volume to minimum, Press enter again then volume down.
service mode is CHK. To exit press ACTION and POWER simultaneously for two seconds.

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