I surely would look at the clutch switch as a failure point, too, since it works in tandem with the side stand switch.
I found a fair amount of corrosion in my fuse box last autumn which surprised me since my bike is stored indoors, not climate controlled but on a concrete pad in a enclosed steel building. A bit cleaning with some contact cleaner and a new coating of dielectric grease and the results have been good, so far :-)
