VT-131 prints?

[Tony Duell]

> If you've got any other VT1xx terminal, swapping out the flyback/video
> stuff that's in common will verify that you're lacking HV for the CRT.

Be careful if you do this. As I mentioned earlier, a bad flyback can 
damage the PCB, a bad PCB can damage the flyback. 

The problem could be the CRT. Yes, I know that the heater is glowing, but 
it's not unheard-of for the cathode connection to break away inside. 
Result : No beam current, and thus no illumnination on the screen. I had 
this happen on a Volker-Craig terminal.

It is much better to measure the CRT electrode voltages and then work out 
what's wrong than to guess and start replacing parts before you have any 
clue as to the problem.

-tony