Coby TFTV791 Instruction Manual page 33

The picture is not full-screen or is stretched wide.
Press to change the aspect ratio setting.
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There is no sound or distorted sound.
Ensure that the MUTE function is not engaged.
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Ensure that the volume level is not too low or too high.
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Poor reception will adversely affect the sound. Try repositioning the antenna, or tune to a different
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channel.
The remote control doesn't work.
Ensure that the Power Switch has been physically set to the ON position.
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Ensure that there are no obstacles between the remote and the player.
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Ensure that the remote is pointed at the remote sensor of the TV.
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Ensure that the plastic tab that protects the battery during shipping has been removed.
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Ensure that the battery in the remote retains a charge and has been installed correctly.
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The player has malfunctioned.
Unplug the unit. Wait 30 minutes, then plug in and power on the player—the restore function should
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reset the player.
Page 33 Troubleshooting & Support