My CB is up and operating

The bike came back from the shop and the CB now works. The cause is a little vague, The Tech told the service advisor that the unit did not work because the switch  (three way switch) was in the wrong position. The weird thing is, we tried the unit with the switch in every position. I believe the tech who installed it missed something but didn't want to have a "comeback", They don't get paid for those. If it was the switch, why did it take six hours to fix it?