Indicator Leds - Vizio SB4021E-B0 Quick Start Manual

INDICATOR LEDS

*Rapid flash indicates incompatible source or file format. If there is no sound output, see Help & Troubleshooting page.
LED Indicators located here:
Indicator LEDs flash according
to input selection:
USB - Input 4*
Optical - Input 3*
AUX - Input 2
AUX - Input 1