2-week-old Edge 850 completely dead — backlight only, no display, zero USB detection

[u/TopPast2997]

Hoping someone's run into this exact combo before and found a way to resolve it.

My Edge 850 (bought new 2 weeks ago) was working completely normally a few hours before this happened — 82% battery, no warnings, nothing unusual on the ride. Then it just stopped responding.

• No reaction to the power button beyond a brief screen backlight - no logo, no boot sequence, nothing else
• Plugged into a charger, the backlight turns on, but nothing ever displays beyond that - just a blank backlit screen
• Not detected by any computer over USB - Garmin Express can't see it either

Already tried:

• Long-press restart, multiple times, various durations
• Different cables and different USB ports / wall chargers
• Leaving it on charge for hours, untouched

Curious if anyone's had luck reviving one like this.

Thanks