Found a 14" crt and a set of genius speakers at the local scrap heap today. Weird place to find old electronics, but the owner told me he's starting to collect and recycle electronics as well. Usually I go there once every two or three months to deliver scrap and bad car parts / batteries and wiring that piles up in the garage, but I guess now I'll have to visit more often.
Here they are - pretty bad shape. They've been out in the rain for god knows how long.
Took it apart and cleaned it. It had dried up mud on the electronics board, but I didn't spot any signs of damage. Tried turning it on - the indicator light would turn green when I powered on the PC, but no image and the tube made a scary crackling noise. I turned it off and used a long screwdriver grounded with a thick car battery cable to discharge the tube and flyback transformer. (don't try this at home, I'm an idiot and lost my CRT discharge tool). Then I removed the suction cup looking thing that goes into the tube and cleaned both the hole it goes into and the exposed part of the wire which was blackened and covered in what looks like soot.
It works!!! Kind of scary to turn these things on without the rear cover, but I wanted to do adjustments if needed. Two of the buttons weren't working, so I had to pull the board out completely to get to them. I sprayed all of them with a bit of contact cleaner and compressed air, and resembled. Now all buttons work perfectly.
It cleaned up really nicely too!