回答“There is no display on power up”Someone on another board recommended to test the power coming into the logic board, to see if the power supply is provided the necessary 23~25.3V required. Using my multimeter, I confirmed the logic board is receiving the correct power. Now I suspect it's something related to cold solder joints, I just don't know what part of the logic board to concentrate on. I looked it over, but I don't have access to an X-ray type machine to examine cold solder joints. Any idea where I should just blindly fix the solder points to fix the backlight issue?