DROP Shift - just plain not working

[AriCinis]

I've been trying to get the LED customization to work, and now the keyboard just doesn't work at all. Followed the instructions to the letter, and now it just seems like it's dead, except it's definitely being detected because while DNU mode doesn't activate at all with FN+B, pressing the reset hole seems to temporarily fool(?) the mdloader into looking like it's doing what it's supposed to do. Windows makes the "Device Connected" noise twice, then makes the "Device Disconnected" noise. At no point does the keyboard work. Extremely disappointed.

Opening port 'COM3'... Success!
Found MCU: SAMD51J19A
Bootloader version: v2.20 Mar 27 2019 10:04:48 [shift]
Applet file: applet-mdflash.bin
Applet Version: 1
Writing firmware... Complete!
Booting device... Success!
Closing port... Success!

Sometimes the port is a different number (COM5, COM4), not sure if that makes any sort of difference. Everything looks like it should work to me, but it's just fucking not.

[AriCinis]

Update: Tried it on another PC to see what'd happen. Not a damn thing.

[VerifiedNerd]

Hey man, not sure if this will help you but I flashed my Drop Shift today following this tutorial exactly for the Alt https://www.youtube.com/watch?v=ucgXm3ZBKm0 .

[Drugantibus]

Flash seems succesful, I suspect this is a problem with the firmware. Maybe try popping by #help-firmware in the QMK discord