Inspect very carefully the assembly of wire on the 1/4 points as none of the metal components should touch the base structure of the points at that place.
The bolt and the wire tabs should all be insulated by fibre washers to prevent this happening, any missing fibre or the tabs bent such that they are touching the points baseplate and the system won't fire.
Check through carefully and compare to 2/3 to see if any obvious problem is there.
Also that both coils have a positive feed from the battery definitely in place.