Vincent Lyon, you have not told us what you have checked. The no video issue can be related to a bad backlight inverter circuitry. A simple check for that would be to darken the room and turn the TV on. Then use a flashlight and angle the light at the screen on different areas. you might make out some shadows or see s slight grey color. Your model uses an backlight circuit on the power supply board. So replacing that should repair your TV. The board is relatively inexpensive and available at places like this.