Samsung
CB-14F1 CB-20P30
CB-20H1 CB-20S20
CB-21H1 CB-21P30
CB-21S20 CB-3373
CB-5020 CB-5073
CB-5079 CB-5320
CB-5373 CB-5379
S15A
CTV
Service Mode
STAND-BY --> DISPLAY --> P.STD -->
MUTE --> POWER ON.
Controls:
VOL +/-, CH +/-.
Exit:
POWER OFF.