Aham, use the browser section to fine tune your input commands and power on delays. I often skip through the initial setup & assignment process just to get to the browser section. It's my go to section to view a MX-810's programming.

What's the issue on the inputs? It should be straight forward. Having only two HDMI inputs for this amp really sucks. If you need a discrete code on the HDMI HDP input, it's on the second remote if you can't find it in the database, I never could find it for the AVR-3808ci.

For Zone 2 or 3 source control, go back and add the amp again but title it zone 2 amp, and import the Zone 2/3 IR codes. This will easily reveal all the sources for zone's 2 & 3 and allow you to manipulate it. Good luck.