General Please note this information for your service.
Model LC-37HV4U, LC-37HV4E, LC-37HV4M, LC37HV4H
Phenomenon An error ??? may be shown in the Audio setting item on Menu.
Cause Wrong monitor type recognition happened when the unit is turned ON.
Servicing In this case, please take the following steps to avoid the occurrence of this phenomenon.
1. Enter into the process adjustment mode.
2. Set the value of item MODEL in the page 2 of OTHER to the following value.
LC-37HV4U : 4
LC-37HV4E : 3
LC-37HV4M : 4
LC-37HV4H : 4
3. Turn the power of monitor OFF.