Cinema 400 - Factory Reset
You can perform a factory reset on the Cinema 400 by holding the power and the source buttons simultaneously for 10 seconds.
To indicate a successful reset, you will see an orange source light (same color as the "TV" source) on the front of the bar, as well as three white LED's. Due to the LED behavior during the reset, it is recommended that you place the sound bar on the Bluetooth, Analog or Digital/Optical source prior to resetting. This way, you can confidently see that the reset was successful.
Note: Performing a factory reset will clear all Bluetooth pairing history and user-programmed IR commands