Contracting gig in the 90’s with one of my best regular clients at the time. Printer issue. Works fine for about half the company, is about 80% for everyone else. Ad agency. Their main color printer. Kind of a big deal. 3 DAYS at roughly $100/hr plus a 90 minute rush hour commute.

…it was a dip switch. “Click. Problem solved.” I basically refused to bill them for $2000 of my time out of shame.