Hi.
A television shows no image, backlights and audio work. obeys the remote, power supply appears healthy.
What waveforms are expected at the TCON board wires in and out, at the tuner output, at the mainboard key spots ? I want to try probing/diagnosing with an oscilloscope and do not know where to check for what signals, like following the progress/process of digital video. Screen is at shut black state, backlight does not go trough display at all.

 

How old is the TV set and what screen technology is it using?