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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 183 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Dual DVD Rear Seat Entertainment Headrest Wireless Headphones Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Before performing this diagnostic select the proper channel by switching the channel selector located on the side of the headphones to A or B and verify the volume is turned up. Also verify that the headphones are not in mute mode. Press the Sound Around ON/OFF button on the remote to change audio muting status.
  1. Verify there are no obstructions that may block the infra-red port located above the video display screen.
    • If an obstruction exists, remove the obstruction.
  2. Turn ON the wireless headphones. Verify the power indicator lamp on both wireless headphones illuminates.
    • If the power indicator lamp does not illuminate on one or more wireless headphones, check or replace the wireless headphone batteries. If the batteries are OK replace the suspect wireless headphone set.
  3. Operate the DVD player in play mode. Set both wireless headphones to the proper channel. Adjust the volume up on both wireless headphones. Verify that only one set of wireless headphones operate properly.
    • If only one set of wireless headphones do not have audio, replace the suspect wireless headphone set. If both wireless headphones are inoperative replace the suspect display containing the infra-red port.
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