mitchell Apperley seems like nothing is ever really simple when it comes to repair. Anyhow, it could be an issue with the power board if none of the things I mentioned in my comment made a difference. You want to start with something like this
which is the troubleshooting flowchart for your set. Let us know if you have a multimeter etc. to start tearing down your TV. Sanyo is a little stingy, so there are no board layouts with the schematics. For that, we will rely on you and need you to post some good images of your boards with your question. Use this guide for that.