SOURCE: Have a vizio model M190VA
What source is connected to the TV (what input is it looking for)? Check that the cables are fully connected and undamaged. If the source is a set-top box or dvd player, make sure the device is on and works for another TV. If the source is OTA, make sure the antenna is pointed in the correct direction and is getting sufficient signal. (Try antennaweb.org or tvfool.com for antenna direction and signal strength. Antennaweb is very conservative in the list and assumes an outdoor antenna.) If you have an amplifier or splitter, try eliminating them to test just the one tv (I've had several amplifiers turn into filters that blocked one station after lightning strikes). Try rescanning for channels.
Try another station or source. If none of these ideas help, you may have damage to the video input board or a problem with the cable from that board to the rest of the TV. If the tv is out of warranty, open up the unit and remove the shielding. Look at the boards for obvious damage (soot, scorch marks, leaking capacitors (look like cylinders on tripods)). My usual source doesn't list parts for this model TV but you may be able to find the board with the part number on the board itself.
I hope this helps.
Cindy Wells
(I use shopjimmy.com for reclaimed parts with minimal use)
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