Client rents two CDJ's and a DJM 800 to use at a venue with a soundman. Calls and says one the left output of one CDJ is toast and that the DJM booth out is broken too. The club 'soundman' supposedly had more years of experience that I had alive, so my phone suggestions were ignored. Fine. I head to the venue with an extra mixer in one hand, CDJ in the other and my troubleshooting tools in a bag.
First 5 seconds there, I fully inserted the RCA from the CDJ. One problem 'fixed'. Second problem was the monitor. It was a passive yorkville plugged directly into the booth TRS out. Nice! After plugging the wedge back into the nicely labelled output plate I routed the booth out into another snake channel and turned up the aux. "WOW" .... "I never thought of that".
Moral of the story? Not all 'soundmen' are so clever. Though, true to the OP - he certainly wasn't flustered. I guess blaming everything else but yourself takes a lot of the pressure off and lets you sneak back to mix position (behind a little swinging half-door of course) and drink more free sodas...
PS. Other moral of the story, some clients must be fired! In the end that client was fired for chasing me down and punching me after a heated exchange. Full story
here.