Sounds like me recently. I recently found this 1985 Samsung 19" color in the trash a street over, in a huge pile of snow. Not knowing what possessed me, I threw it in the trunk of my car, adn brought the filthy snow-covered set in the basement room, and proceeded to brush the snow off, and set the TV on otwels on the floor. I let it sit for a day to dry off, and cleaned about a solid 1/2" of dust/dirt out of the inside. Plugged it in after freeing up the frozen controls, and it has a picture that's clear as a bell
Sometimes it's best not to question why....