Following-up on the Apple IIc computer refresh, I recently cleaned up the IIc’s monitor. Disassembly of CRTs can be dangerous due to high voltages, but at the point of disassembly it had been unplugged for a few weeks and I made sure to discharge the tube and capacitors as soon as I could. From there it was just a matter of cleaning the plastics, using a magic eraser for scuffs, and de-yellowing. The de-yellowing is accomplished by covering the surfaces in peroxide, putting the parts in bags, and then submerging those bags in a bath of hot water kept warm by a sous vide heater.
A few of the potentiometers for size/position/brightness were dirty, causing the picture to cut out unless adjusted perfectly. This was resolved by spraying some contact cleaner under the knobs and exercising them.
