No, it's not dead, at least it certainly is not the picture tube.
Your set probably didn't like Knight Rider - at least that episode!
Seriously, how old is the set? Is it a totally solid state chassis or are there tubes in the deflection circuits?
Is there any indication of light on the screen? Any indication of the 15735 Hz horizontal running at all? (You would normally hear the high pitch sound).
Newer TVs almost always derive voltages for the sound circuits from the horizontal deflection but older hybrids may run the sound off of its own power.
In any case, there is a problem in the horizontal deflection and you probably have no high voltage as well assuming no light on the screen.
The fact that it squeezed in first indicates that a partial short or other fault may have developed in the horizontal deflection circuits - possibly the deflection yoke or flyback transformer. It could also have been a bad connection letting loose. Once it failed completely, the horizontal output transistor may have bought the farm or blown a fuse.