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Reminds me of many years ago when my coworker's monitor was flickering. So we replaced the monitor. Same problem. We replaced cords. Same problem. We replaced t
by suzzer99 5y ago
Reminds me of many years ago when my coworker's monitor was flickering. So we replaced the monitor. Same problem. We replaced cords. Same problem. We replaced the computer. Same problem. Eventually we put his monitor and computer on a cart with an extension cord and wheeled it into the hallway. Problem went away.
It turned out his room had bad electrical shielding and magnetic interference was janking up the CRT monitors.
- andy_ppp 5y agoI would say the monitor had the bad electrical shielding…
- LeonM 5y agoActually both. When you produce electronics, each device must pass an electromagnetic compatibility (EMC) test before you are allowed to legally sell it. It test both the electromagnetic emission and the electromagnetic immunity of the device. So not only shouldn't the device emit more than a certain level of EM power, but it must also be able to withstand a certain field strength without losing functionality.
- wizzwizz4 5y agoThere's a limit to how much magnetic field strength a CRT can withstand, unless you shield it well enough that the screen is obscured.
- suzzer99 5y agoThe monitor was fine in other rooms. We brought in a magnetometer and it went off the charts on the wall near the electrical box in that room. The landlord of the building eventually had it fixed.