PuP screen at a negative position
What it means
PuP videos may show in the wrong place.
Why it happens
A screen left of or above the main one has negative coordinates in Windows; PinUP's troubleshooting page asks for no negative positions.
How Pincab Toolbox detects it
An [INFO…] section of PinUpPlayer.ini has a negative ScreenXPos or ScreenYPos value.
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).