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Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.
When you say you saw no power at the control panel..........this is the one in front? Did you pull the plug out and test it or just didn't see the lights come on?
I am attaching a link to the Dometic Serivce Manual which covers this model. See the section on testing the upper (front) control board. You might want to pull the plug out for that on the rear which is the one in the top upper left hand corner and push it back in again. Sometimes moisture or dust can affect the contacts. I am sure you have a meter and know how to use it so I won't go into that here. Let me know what you find and do a test for AC ripple and see if that is a factor. Some older converters have this problem and it plays havoc on control boards. http://bryantrv.com/docs2/docs/domser.pdf
.5 VAC is acceptable, but more than that will be an issue. If you are not familiar with this testing let me know.
You are most welcome! Let me know what you find and we can go from there. I will be in and out all day and watch for your post.