First, make sure you’re
patched up to the last version.
I do recall Final Calc being a lot more “sensitive” than Final Writer and Final Data (it was coded by a different person/team than the other “Final” apps). You said you tried NTSC HiRes Laced, but at what color depth? If you haven’t already, see what happens at 16 colors instead of 256.
Anything else unusual running on your system? Hacks? Non-stock commodities?