Don't know if this is similar to your problem, but I just posted this on Open Roads Forum:
I had a problem with my Dewald leveler system on my 2002 Georgetown since 2010. The slide out hydraulic function worked fine, but the levelers wouldn't do anything. I suspected the control panel to be the culprit, but that was already obsolete and unavailable (Dewald DN12558). A local RV shop sold me a new hydraulic pump motor (big bucks) the first time and when I still had problems, sold me a new hydraulic pump (but for some reason had to again replace the motor and could never seem to get my "old" motor returned to me! Long story!
HOWEVER - THE GOOD NEWS: I spoke with someone at Power Gear and they recommended an electronics repair shop in Ohio City, Ohio (I live in Maine). I sent the DN12558 control board to them and about a week later I got it back and it worked like new. They said it had quite a bit of water damage (I had a few leaks around the window once) and many faulty components. Total cost was less than $350 including shipping. Compared to the alternative - new leveler system - that was a bargain! I had to share this because I had seen some older posts with the same problem.
Ohio City, OH
Thank you Power Gear for the referral and THANK YOU M&M Electronics.