LG SPH7B-W - Hidden Mode

1-6
 Reset the Speaker
Press and hold the ‘ (Add)’ button for 8 seconds.
 Micom reset
Main unit ‘ (Volume)’ + Remote control ‘SOUND EFFECT’
 Option code mode
Main unit ‘ (Volume)’ + Remote control ‘ (Night Mode)’
 Wireless reset
Main unit “VOL MIN” (volume minimum state) + Remote control ‘ (Mute)’ for about 3 seconds.
HIDDEN MODE