Facing TV Problems? Ask a TV Technician.
Did you replace the boards before or after there was a vertical line flash and the screen went dark?
Ok, this does sound more like a problem with the main board if you have sound but no picture.
Can you try fitting a replacement main board?
The main processor board is in the lower right corner of your photo, labelled ACCLLHR.
This board processes the input signals and outputs them to the display.