Nothing quite says vintage computer like a dedicated glass terminal. We enjoyed [Adam]’s restoration of an Acorn CRT monitor. The 14 inch display had a common problem: a defective power switch. Replacing a switch shouldn’t be a big deal, of course, but these old CRT monitors have exciting voltages inside and require special care.
One common issue, for example, is the fact that the old CRTs are really large capacitors and can hold a dangerous charge for some time. The easiest way to handle the potential problem is to make sure the device is unplugged, ground a screwdriver blade, and push the blade under the second anode cap. Most of the time, nothing happens. Once in a while, though, you’ll hear a loud pop and you just saved yourself a nasty shock.
Even though the actual repair was pretty mundane, the teardown was a great nostalgia trip and while we don’t want to give up our LCD, we do like the old glass. CRTs have a long history and came a long way before their last gasps. They even took a turn as mass storage devices.