I've got a 9770 that some of the switches on the hydro handle don't work when the handle is pushed forward. Pull the handle back closer to neutral and they will work. A year ago I had ag express change all the switches and that did not help. It's not as bad when I first start for the day, then gets worse as things warm up. The wiring from the handle seems ok. Is there an electronic board that could be going bad? Thanks in advance.