I don't know about your coach, but on our previous coach, an '06 Dynasty, I do not believe that I could have done what you are hoping to do, manually. On ours, the air had to be dumped (or increased) to get all of the air bags to "ride height" before the coach could be operated. With a "dead" control panel, I don't know how I might have been able to do that.
On our coach, there was a rocker switch that was a "RESET" for the system. I did not see your post that you refer to several days ago, so I don't know if the RESET was talked about. On ours, that switch was in the front run box, on the outside of the coach, but manufactures can get pretty creative as to where to mount devices such as that.
I'm attaching the repair manual from HWH that applied to our coach. It may or may not be helpful. The "troubleshooting" section starts on page 3.
We had to have our leveling module (the 6" x 9" x 12" approx unit) that was mounted to the ceiling in one of our basement bays returned to HWH for repair, and they did a good job for us, but that was probably over 15 years ago, and I do not find any records of shipping dates or repair quotes for the work. It was removed, returned for repair, returned and reinstalled (by me) while we were stationary, with no impact on our travel plans, so I don't have any way to determine how long the process actually took.
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Jim & Angie, Boise, ID
2021 Entegra Esteem 27U
2017 GMC Acadia Denali
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