The original Luxeon III LED (max 80 lumens) is pathetic by 2021 standards. You can replace it with a modern LED that drops right in.
Also, mention checking the rope compatibility. Petzl specifies what ropes work with the Myo XP. After repairs, ensure it's compatible. petzl myo xp repair 2021
Article last updated: July 2021. Covers all known repair procedures for the Petzl Myo XP and Myo XP Belt. The original Luxeon III LED (max 80 lumens)
The cable on the MYO XP is prone to internal breaks due to a tight kink at the entry point. petzl myo xp repair 2021