Panasonic CT-36G34 36" TV "turn old sylvania game" Questions

...Sylvania tv isnt too old...3 years probably. We were watching and it was fine... then the next morning we turned it on and the screen is grey with a bunch of flickering horizontal lines about a half ...

...old Zenith universal remote that does work with it in some ways (See directions below).  I can turn the TV on and off, set the channels, language, clock.. etc through the Input select button on ...