[john70t]

(first world problems)
Bought a cheap tv a few years ago. It started flashing "No signal", then sometimes picture would return, then "Resolution not supported" with BSOD. Occasional random flashes in the middle of movies then normal after 10 seconds. It would be fine for hours and weeks but if rewinded or paused would go into the loop again. Two different DVD players and same result.
Drove me nuts.
It was okay 80% of the time. Maybe this monitor wasn't made for tv?

Tried every single resolution setting possible. Some would pulse the brightness. Tried off/on and switching the input select. Unplug to clear memory. Wiggled cords. If I plugged it into the other HDMI port and restarted the tv while the DVD was playing it would work. Then yesterday it started buzzing and gave a 1 second flash every 30 seconds. I was done messing with it. Ready to be recycled.

This tv was defective.
Nope. It was the brand new Belkin HDMI cable I'd purchased at that time.
The one variable not checked. The most non-obvious thing to the symptoms.
Different cable.
Works fine today.