Radio/Printer Issue
Years ago I was a radio tech and had a call about a station in an office that would lose connection to the system every 4th day. Took a bit of time to realize the problem was RF interference on one of the four control channels (trunked radio system). Sweeping the building for the offending signal was quite impossible as the signal appeared to be coming from everywhere, even with a directional antenna. After a couple of days, I finally figured out the signal was coming from the building computer network and was being amplified by every printer's NIC in the building. Disconnecting printers one-by-one finally revealed a bad JetDirect card in a plotter. Once I let the customer know what the issue was, they remarked that they were getting rid of that particular plotter in a few days. Had I not found the cause of the issue, it would have magically disappeared and left me boggled.
Biting the hand that feeds IT
