If the heater is fine on the CRT, then chances are that the CRT itself is all right.
You only had a point on the screen as there was no deflection. Now it is possible that the point, or the line (if the sweep generator is running), is off the screen.
Start by checking the DC voltages on the CRT and on the final tubes, V3, V8. Luckily the schematics gives all the proper voltages.
Be careful, the highest voltage is 1.6kV!
Another scope would be useful to see if the sweep generator multivibrator is running.
Good luck, Peter