Is the service manual. It will detail how to read voltages at test points and guide what boards to replace.
I see a lot of folk wanting to repair a TV without a service manual. I can't guess why.
TV just shut off. Will not power on with remote or when pressing front panel button on TV. No visual or audible signs of power. I pulled the back panel and there are no visual signs of bad boards. No bulging or burnt capacitors. I verified there is power to the power supply board. All 3 fuses on the power supply board tested good with my meter. Not sure if it could still be a bad power supply board or some other board?