AltColor present but not enabled
What it means
The DMD colorization set is complete and correctly extracted, and still renders in plain mono.
Why it happens
Same story as the sound one: the enable switch for DMD colorization is a separate per-ROM VPinMAME setting, not a file — a complete extraction doesn't turn it on by itself.
How Pincab Toolbox detects it
The altcolor folder for this ROM forms a complete set, but VPinMAME's own DMD colorize setting for this ROM is still at its default (off).
Automatic repair
Repair, included in the Pincab Toolbox licence, can fix this one for you. Your files are backed up first, and the fix can be undone.
Check your own pincab
Pincab Toolbox is a free Windows scanner for Visual Pinball X and PinUP Popper. It finds and explains problems like this one. No account, no telemetry.
Download for freeCovered: Visual Pinball X (10.x) and PinUP Popper. Not covered: Future Pinball, Pinball FX, Visual Pinball 9 and the other frontends (PinballX, PinballY).