My Vizio 42" flat screen TV worked one day and the next day nothing. I can still play dvd's through my blue ray player that is attached with an HDMI cable but will not work in TV mode.
The TV is 1-1/2 years old and out of warranty.

Are you using an internal tuner or additional box ?
Have you checked all the cabling ?

There is a cable box attached. I have not checked the cabling since installing the new cable box about 6 weeks ago. All other tv's in the house are still working.