2nd row media/ac controls not working HELP

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Feb 25, 2014
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I just bought an 07 Tahoe lt fully loaded minus the moon roof. It has navigation (which for some reason looks like graphics from the original Mario video game) but thats not the issue at hand. My biggest concern right now is the controls for the second row passengers. The screen is blank with no signs of life i haven't tried using ear phones yet but idk if the volume/tuner knobs work but i know the "skip button" doesn't affect the dvd being played at all. The Power button does turn the over head dvd screen off as well as the rear speakers (but the volume knob doesn't effect the speakers) the button to increase/decrease the blower fans works good you can hear and feel the blower get stronger then softer but the temp control button does nothing. No increase to Heat or ac. I'm not sure what the issue is but any help at all would be appreciated. Please advise if you need more info
 
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