Lastwords

Well shit. I purchased the AVIC 8100NEX last week and just had a guy at the local shop install it. I went to test a music video and if I have it in gear it will not play. So BAM, here I am trying to find a fix. I went out and turned it off and then put my finger on lower left quadrant but nothing came up, do I have to have it grounded and such before that will even pop up? FFS I hate to have to take it out of my dash just to ground it. Any help would be appreciated.