B3 first group of drawbars for upper manual dead

[B3 Fever]

This B3 hasn't been played or moved in a few months. The last time I played it everything worked fine. Today I find the first group of drawbars to the upper manual are dead. First thing I did was to extensively work all the rocker switches including the V/C selector in case there were dirty contacts- no luck. Then I worked each "dead" drawbar one by one- no luck. The second group of drawbars for the upper manual all work fine. In fact, everything else (including the presets) work fine. With every drawbar (including pedals) pushed in, the volume rocker set to "Normal", and the volume pedal fully depressed I get a faint tone when any of the top manual (only) keys are depressed. Sounds as though the tone also has a short percussion effect with it. There seems to be a louder than normal hum at the Leslie but can't say for sure.

Any help would be appreciated!

Thanks...Rich

[Jaim]

First set of DB's as in Bb preset? If the B preset works, then the only difference is the Bb preset contacts and wiring to DB's. Try holding down the Bb key - maybe it isn't locking all the way down.

Jim

[B3 Fever]

You da man Jim. The Bb contact was dirty. Came to life after working it about a dozen times. Guess I need to play it more!

Thanks!
Rich