The "dead display" problem is very common. Although it can be caused by a bad crt (from shipping damage, say, or a repair job gone wrong), more often it's a fault on the analog board. Bad solder joints on the yoke connector (J1), bad capacitor C1, and a dead flyback are the three most common causes of a dead display.

If it is a dead crt, then you can certainly transplant the crt from your Classic into it. The yoke may not be suitable, but the crt itself almost certainly is.