Chosen Solution
Where is the T-con board located on a TCL model 48fs3750tdaa 48” led tv as I am not finding any replacement T-con boards online for this model and the loss of picture seems like it is a T-con issue? Update (11/06/2019)
@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. Adding images to an existing question 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.