No signal message - Insignia 32" LCD TV

So hoping someone can help me and tell me this is going to be a simple fix. Sat down after a long day and decided to throw in one of my favorite movies. I press play on the Dvd and turn the TV to the appropriate input and I get sound for literally half a second and then the message no signal. Every time I put it to the appropriate input this happens no matter how many times I do it I get sounde for half a second then a no signal message. I tried different cords,dvd players, and changing it from input 1 to input 2 and still the same problem. My cable tevlevision that plugs into the hdmi input slot works just fine. Any ideas all you friendly people?

are you using hdmi input for your dvd player also.if you are then swap the inputs if your t.v. has 2 hdmi inputs because you know one allready works.if it doesnt play you may have hit the format button on the remote or another button that the input does not recognize.if your using component or standard yellow video also make sure the input supports your settings

No using a component input and has worked for a year and half till last night so have no idea what I could of done.