u/No-Top4123

Hey everyone,

I’m stuck in a really frustrating situation with my GMMK 3 Pro Wireless and could really use some expert advice.

So here’s what happened:

• My 2.4GHz receiver was dead on arrival
• While trying to fix it, my brother accidentally flashed the dongle firmware onto the keyboard PCB
• Since then:
  • USB completely stopped working
  • Keyboard is NOT detected at all on any PC (no DFU, no unknown device, nothing)
  • 2.4GHz obviously doesn’t work
  • Bluetooth still works perfectly

I’ve already tried:

• Different cables and USB ports
• Different PCs
• All key combinations (ESC, FN+ESC, ESC+SPACE, etc.) for DFU
• Reinstalling Glorious Core

No luck at all — it just doesn’t show up via USB.

At this point I think the bootloader might be corrupted.

My question:

Is there ANY way to recover this without opening the keyboard or using ST-Link?

Like:

• Any hidden DFU trigger?
• Any way to flash firmware over Bluetooth?
• Any recovery trick I might have missed?

Glorious support offered to send a replacement PCB but only to Canada, which isn’t practical for me (I’m in India).

I’m okay with advanced solutions, but trying to avoid opening it if possible.

Any help would honestly mean a lot 🙏