DECmate III and Rainbow 100+

[Geoff Reed]

> > And yes, the whole thing is powered, rather poorly, from 12 volts.
> > (Poorly: if you flip significant quantities of white pixels on and
>
>I've never had this problem. Are you sure you've not got some dried-up
>capacitors somewhere?
>
> > off, the scan area expands and shrinks very noticeably.  So clearly
> > the supply regulation is seriously inadequate.)

the VR 201 monitors have a couple of points of failure, the most common is 
a coil (IIRC) in the vertical that is potted in wax, they potted this 
-before- soldering, and wax tended to get down into the solder joint making 
a bad joint that fails after a while, there is a resistor right by it that 
also burns up at about the same time.