I'd open the lamp holder and check for a short, but also the wall switch, which on occasion has been reported here as troublesome. Getting at the switch can be no picnic however, from what I've heard. And touchpads can be tricky. But if a wire has inadvertently gone to ground there, it should be easy to see and reroute.
Appreciate the info, Russ; I've been learning some circuit board repair myself, for this very reason - it's cheaper to repair myself if it can be done at all, and electronics is our world nowdays.
-Joel
Reference, Load 6, module A: