Well darn. TV started shutting off after a few minutes. Finally, I thought, I can replace this POS Jensen with a new Samsung TV with better scan rate and better resolution.
Alas, the problem was simply a bad inline fuse holder, which showed signs of overheating leading to damage to the contacts. Yet another place where Thor saved 10 cents.
The DW says "Thanks" to this forum for removing my excuse for a new TV.