only half of the VFD works. Ie, the right half of the display is working correctly, and the left half is not working.

This is a defect that can only be corrected by support. Right now, support is a bit backlogged, but definitely contact them about this ASAP.

I do not know if this is a problem in the display board or in the VFD glass itself. Yours is the third time I've seen it reported. Cambridge folks: Is this a board problem or a VFD problem? Can the fix be outlined here so I can FAQ it?