75" TCL 8K Roku TV bad T-CON or LED Board?

[nextTV]

I Have a 75" TCL 8K Roku TV (75R648) that I think has a bad T-CON or LED board.

The TV powers on and has audio, but the screen is grey and cloudy or has digital noise.
I can navigate the menu, but obviously, I can't see what I'm actually doing.

Tried power cycle w/ no results.

Without pulling out the multimeter and testing the individual boards, any ideas about what is going on here?


Images:





https://streamable.com/ilnzjj

[Diah]

its look a common fault at this brand.. its floated complain on same issue at amazon
some things you cay try
you have 4 ribbon cable connected between the T-CON and panel... try disconnect only one cable No 1 and the last No 4 a time and check the screen ( 1-4 will be 1 on yours left hand when you look on them from the back of the TV )

second try... discharge the completely then turn on... to do this disconnect the plug between power boards and mainboards.... and disconnect the LVDS cable between it and mainboards... keep this over night..

of course photo of all boards will be helpful too

[EazyBone]

I had this TV. It was the far right ribbon from tcon. Tape method surprisingly made the TV workable again with very minor issue. Obviously not a fix but at least something you can do to get more life out of it potentially

[nextTV]

Thanks, guys,

I'm going to pull this TV off the wall this weekend and take a look a the boards. While I have it open, I'll try the tape method on the ribbon connections running from the T-CON.

[EazyBone]

Just go directly to TCON, disconnect one ribbon at a time from tcon side so you don't accidentally ground the cable and plug it in, if you get 3/4 screen then it's a short on that line. There is some complicated boards in this TV so I'd just start there. If you get it then do tape. Good luck