Bricked my PIN2DMD when updating, and now Windows 10 won't see it

[dogfoot]

I updated all of my PIN2DMDs to the latest firmware except when I tried to update the last one it bricked. The PIN2DMD was working great. It is based on the Nucleo F429ZI board to the latest firmware. I saw an "UPDATE" message and then the display went black. I've tried to connect it to my Windows 10 PC to reflash with no luck. The device is powered by an external 5V source, and it does power up.

Things I have tried:
Different USB cables
Different USB ports on my PC
Both the USB USER and USB PWR ports on the Nucleo
Removing both jumpers at CN4
Both ST-LINK and STM32CubeProgrammer

Both say "ST-LINK not found"

I have a feeling I'm doing something wrong with the cabling or perhaps the drivers in Windows 10, but I don't know how to debug it from here. Any help would be appreciated.

[lucky1]

Only the ST-Link USB port is for programming. The user is for pin2dmd application only

When you connect the ST-Link USB port to your PC does anything change in the Windows devixe manager

[dogfoot]

Ok so I plugged in to the USB user and plugged it into my PC with device manager up, and nothing changed.
I have two solid green lights on the board, one solid green on the PIN2DMD board, and a fast flashing red and slow flashing red led.

[lucky1]

What happens in the device manager when you connect to USB ST-Link ?