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@saywhat1moretme TCL is still a bit of and Off-brand model. We would need to know the layout of your TV . Remove the back and take some good pictures of the way your TV boards are placed. It is easily possible that your model may have a T-con board that it integrated into the main board. 在已经存在的问题里加入图片
Make sure that this is not a backlight issue. If you have sound but no picture shine a flashlight beam at an angle against the screen. See if you can make out shapes etc.
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It should connect to the ribbon cable coming of the main board connector P502. Follow that cable and remove the metal foil along the cable
由 oldturkey03 完成的
I followed the cable from the P502 and it goes to a long one inch wide board along the bottom which is stamped ST4761B02-1. Does this sound like a the right tcon board and if so where can I buy one? Thanks
由 Jules Winnfield 完成的
Any resolution to this issue? I have a 55s405 which has a similar layout, no T-Con board in between the main and power boards…which I have already replaced.
由 D C 完成的
@D C ,
The tcon is located between the mainboard and the LCD panel.
The function of tcon board is to control the logic signal of gate and source supplied by the mainboard, for driving the TFT LCD panel.
If there is no separate tcon board then usually it is built in with the mainboard.
Check which board the wires going to the LCD panel connect back to.
由 jayeff 完成的