Chosen Solution
I have a Hisense 55K23DGW, We were watching TV when the left ~1/3 of the screen when darker, a minute later, we heard a loud pop and lost the entire picture completely but we still had sound. What could be the reason behind the pop and loss of picture?
It is either the backlight LEDs or the power supply, especially since part of the screen went dark a bit before the pop.The power supply board is responsible for driving the backlight LEDs.If you have a very powerful flashlight, try shining it on the screen and seeing if there is still a picture (something with lots of white works well, since darker colors are hard to see without a backlight).Since you still have sound, that means that the low voltage section of the TV is still functioning. If you do still have picture, you should try opening the TV and looking for obvious damage on the orange(ish) colored board that should be visible. Please make sure to not touch that board, too. It carries high voltage AC and DC, and will still have power left in the large capacitors on it after it is turned off. Things to look for would be scorch marks, cracked/burned components, and bloated capacitors.If you see any of those things, the board is definitely bad. If there aren’t any of those, there’s still a chance it’s bad, but it could be the LEDs too.
If it was being caused from over heating and it has cracked from the inside please do not try and use it even if there is some screen left that is not rendered useless this board and is not or other things in conjunction are not to spec and it could be a serious fire issue . The guy above is concerned with LED lights I am not a light person just a geek from before the WWW came along and have seen what destruction can be had by trying to power and run a board that was ill equipped to even try. The Lights I would guess would put off a smell sound problems would have happened sooner ..idk now I am off to find out what’s the what..be safe!
