Chosen Solution
Sharp Aquas 810 LED. Display goes black but I can hear sound. Power button flashes slowly, will not let me power off and back on
Travis Lay here is the general fault finding for the No Video in all modes. Start with that:
It will help if you can post some images of all of your boards with your question. Use this guide Adding images to an existing question for that. Right now it could be the power board (has the inverter circuitry for your backlight), t-con board or worst case the panel itself. You will need at least a multimeter to check a few things.
