Yamaha RX-V620RDS repair part 2

I made a video a while back about a Yamaha surround receiver that I was troubleshooting. I decided to make that video into a little troubleshooting riddle rather than showing you directly what the problem was. The reason for this is that you learn a lot more when getting involved with something yourself rather than getting the solution served on a plate.
In this video, I present the solution to the questions that I asked you in part 1 of this repair.

Be sure to check out part 1 before watching this video, as watching this video without first watching part 1 will make it more difficult to understand how everything comes together.

Part 1 can be found here:

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