How to make the volume work

Hello,

Here is a factory guide on how to troubleshoot the DVD system

VIDEO ENTERTAINMENT SYSTEM TROUBLESHOOTING HINTS

Many conditions that affect video system operation may be corrected without removing the radio, the digital video disc (DVD) player or the video entertainment overhead console from the vehicle. Make sure to understand all features of system operation before beginning the diagnosis of the system. Verify the condition and follow the diagnostic procedures in order to isolate and correct the condition.
Be sure the vehicle battery is fully charged before beginning video entertainment system diagnosis.
Video Or Audio Distortion
The manufacturing process for producing DVD's does not have the same quality control processes in place that compact disk manufacturing does. If there are video or audio quality problems with an individual DVD, try playing that disk in another DVD player. If the quality is poor for both players, return the disk to the place of purchase and request an exchange. If the quality problem is only seen in one of the players, examine the disk for scratches dirt or smudges and attempt to clean the disk with one of the disk cleaning systems that are commercially available.

Video or audio distortion during auxiliary playback can often be attributed to the DC to AC inverter that is used to power the auxiliary device. The power inverters tend to introduce noisy signals into the vehicle electrical system.

Video Entertainment System Wireless Headphone Inoperative

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition.

Volume control on the wireless headphone set is turned all the way down. Adjust the volume control on the headphones.
Dead batteries in the wireless headphone set. Turn on power to the headphone set. If the headset indicator does not turn on, replace the batteries in the headset as needed.
Faulty headphone set. Test the operation of the system using a known good headphone set. If operation is OK, replace the vehicle headphone set.
Video Entertainment System Remote Control Inoperative
The buttons on the video remote control do not operate the video disc player but the buttons on the video disc player operate normally.

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition.

Dead batteries in the video remote control. Replace the dead batteries.
Faulty remote control. Test the operation of the system using a known good remote control. If operation is OK, replace the remote control.

Please let us know what happens so it will help others.

Cheers, Ken