Usually caused by a break in the internal wires of the power cable, specifically at the "hinge" point where the cable enters the lamp housing.

Before starting, ensure your headlamp is no longer under its 3-year warranty, as self-repair will void it. 1. Tools Required UKC Forums - HELP! Petzl Myo XP malfunction - UKClimbing

Moisture in the battery compartment can lead to corrosion that blocks current flow. Step-by-Step Repair Guide (2021)

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