I been having same problem except my lower bulbs on screen have gotten to 118 degrees so I have big concerns of fire!!!

Plus tv just crashes then goes into reboot mode at times can’t turn on or off and Samsung has no answer and dealer has no answer.

So I been going in basement where my box (black) is unplugged tv wake a minute plug back in and good for who knows maybe 1/2 movie or 1 quarter of football game

This tv has a wire similar to a guitar string feed through the wall into basement black box.

So my only solution at this time is a FAN on tv when watching tv this way it cooling the led bulbs. Plus I missed extended warranty by few months!!!

Samsung said they will give me $100.00 off a new tv THEY ARE SO KIND N O T !!! I’m done with Samsung

But here’s my model number: QN 55Q7FNA