Boss Audio bv9972 User Guide

After ignition 
switch off, setting 
information all lose

Remote control no 
function

Poor performance 
of radio station

Can not load disc

Can not play disc

Can not switch 
language/subtitle

No image

PROBLEM

Can not power on 

CAUSE

Check whether power fuse 
blew or not

Some factor cause MPU wrong 
operation

No enough power supply 
from battery

Disc is scratched

Put wrong side of disc into unit

Lens has dirty

There is only one language/
subtitle in disc

Video line between unit and 
TV is not properly connected

SOLUTION

Change fuse same as the old one

Press RESET button on the panel by pen 
point, then, power on

Check whether antenna is connected or not, 
or poor connection

Change new disc

Slot in the disc with sign side up

Clean lens by lens clean disc

If disc is not with multi-language/subtitle, it 

cannot switch language/subtitle

Reconnect lines

Improper length of antenna, 
poor connection of antenna 
grounding

The disc will not go in all 
the way

Change the wiring around

Change battery in remote control

Remove the 2 screws on top of the radio

Wrong connection between 
ignition line ACC and 
Constant 12 Volt wire