Facing TV Problems? Ask a TV Technician.
Hello and sorry you're having problems. This is a hardware failure in the TV- either in the mainboard, power supply board or both. What tools and experience do you have- and are you looking to repair the TV yourself? Or are you looking for a repair estimate and service locator?
Thanks for the reply. There's not a one shot diagnosis, and a multi-meter and the ability to measure live voltages is required. Do you have a meter?