u/Past-Bread2846

Hey everyone, I’m in need of some troubleshooting help. My Keychron K2 V2 (White Backlight) is completely bricked after a firmware issue.

The Symptoms:

• The keyboard is completely dark (no backlights at all).
• The only sign of life is that the side battery/charging LEDs turn on when plugged in.
• Windows gives absolutely zero reaction when I plug it in—no connection chime, no device list refresh, and nothing shows up in Device Manager (even with hidden devices shown).
• QMK Toolbox and the Keychron Launcher web app do not detect any device.

What I’ve Already Tried:

1. The standard Esc key method: Unplugging, holding Esc, and plugging it back in does nothing.
2. Shorting the boot pins: I located the two holes under the spacebar. I used metal tweezers to short them while plugging in the USB cable. Still, Windows doesn't acknowledge any device connecting.
3. The Bluetooth-mode trick: Tried shorting the pins while the side switch was set to Bluetooth/Off to see if it would force direct USB routing. No change.
4. Isolating hardware: I am using a verified USB-A to USB-C data cable plugged directly into my motherboard's rear USB ports (no external hubs).

Before I go through the hassle of opening the case:
Has anyone encountered a K2 V2 that goes completely dead on data lines but still shows charging lights? Is it worth unscrewing the case to physically unplug the battery from the PCB to drain the capacitors, or does this sound like a completely fried MCU/dead flash memory?

Any advice or alternative jump-start methods would be heavily appreciated!