Some of these inexpensive small screen tvs have a small switch in the back to switch between 120 volts and 12 dc. I used to find loads of these sets that complained that unit wouldnt work on ac but did on dc or vis versa Its somwhere on the back around the dc or ac plug connections. Good Luck
Are you certain the polarity of the connections to the TV are correct? If you connected them in reverse you may have damaged the TV. If there's a fuse in line check that too. BMW
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