Incorrect connection between ACC and positive battery
Check wiring and correct

UTE wire is grounded Check that UTE connection is not grounded and that it properly insulated

Pirated disc is in use
Use original copy

Speaker power rating not compatible with unit
connect proper speakers

Speaker is shorted
Check speaker contact

Battery depleted
replace battery with new one

Battery installed incorrectly
Remove battery and install correctly

Fluorescent tube is exhausted.
Replace the fluorescent tube*.
* The fluorescent tube replacement is not free of charge even within the
warranty period, for the tube is an article of consumption.

Connections to the navigation system are incorrect.
Check the connections with the navigation system and connect
the cables correctly and firmly.

Fluorescent plate is worn out.
Replace the fluorescent plate.

Temperature in the vehicle is too high. 
Allow the vehicle interior temperature to cool.

Brightness control is set at the minimum position. 
Adjust the Brightness control. 

Temperature in the vehicle is too low. 
Increase the vehicle′s interior temperature to operation temperature range. 
Connections to the DVD, CD player, navigation system are not securely made. 
Check the connections and firmly connect.

Improper audio output connection 
Check wiring and correct 

Volume set too low 
Increase volume level 
Improper "MUTE" connection 
Review wiring diagram and check "MUTE" connection 
Speakers damaged 
Replace speakers 

Heavily biased volume balance 
Adjust the channel balance to the center position 

Speaker wiring is in contact with metal part of car 
Insulate all speaker wiring connections

Vehicle′s ignition is off. 
If connected according to the instructions, 
the unit will not operate with the vehicle′s ignition off. 

Improper power lead connections. 
Check power lead connections.

Blown fuse.
Check the fuse on the battery lead of the unit; replace 
with the proper value if necessary. 

Internal micro-computer malfunctioned due to interference noise, etc. 
Press the RESET switch with a ballpoint pen or other pointed article. 

Blackout mode is activated.
Cancel Blackout mode.