GMC 2012 Terrain Owner's Manual page 191

No power.
The picture does not fill the screen. There are black
borders on the top and bottom or on both sides, or it
looks stretched out.
In auxiliary mode, the picture moves or scrolls.
The remote control does not work.
After stopping the player, the pushing play, sometimes
the DVD starts where it left off and sometimes at the
beginning.
Tips and Troubleshooting Chart
Problem
Infotainment System
Recommended Action
The ignition might not be turned to ON/RUN or
ACC/ACCESSORY.
Check the display mode settings in the setup menu by
pressing the display menu button on the remote control.
Check the auxiliary input connections at both devices.
Check to make sure there is no obstruction between the
remote control and the transmitter window.
Check the batteries to make sure they are not dead or
installed incorrectly.
If the Stop button was pressed one time, the DVD player
resumes playing where the DVD was stopped. If the
Stop button was pressed two times, the DVD player
begins to play from the beginning of the DVD.
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