1970s J. C. Penney 19" Color TV issues

[vortalexfan]

Hello everyone, earlier today I had picked up from a local electronics recycling facility/computer store a 1970s vintage solid state J. C. Penney 19" Portable Color TV that when I got it home to try it out everything on it except the picture worked on it, it has audio and the channel selector lights work and everything.

When I turn on or off the TV I see the colors wash across the screen like it was showing some sort of picture but when the set is actually one or powered on the screen is completely blank, no snow or anything.

Any ideas as to what could be wrong with this TV?

Also who made this TV for J. C. Penney? It says Made in Japan on the back of the set.

Pictures of the set in question posted below.