I work in a locally-owned music store which does repairs. We have musicians come in all the time with gear, telling us "it doesn't work." After hooking up the gear to test it, we find that it works perfectly. All too often the owner has no idea how to operate and hook up the gear that he owns. Case in point: a customer brought in an older Peavey powered mixer he had purchased on craigslist. Two outputs on the back, plainly marked "speaker outputs, 4 ohm minimum load." Seemed pretty simple to me. But the customer pointed to the extensive patch panel on the top of the mixer (main mixer line out, monitor mixer line out, main and monitor returns, effects sends and returns, eq in and out, power amp ins, etc.) and said, "How many speakers can I plug in here?" Well, the real answer of course is "none." One could also say sarcastically "as many as you want (but none of them will work)." Another customer brought in a wireless mic. "This doesn't work," he said. Turns out he had inserted the battery backwards. We now use an acronym on the bottom of our repair invoices, in the comments section. When appropriate, we write "EEOC" on the invoice. Translation: EQUIPMENT EXCEEDS OPERATOR CAPABILITIES Feel free to share any further stories of technical incompetence you've run across Remember folks, always RTFM!