It appears it has a two year warranty. I would contact the manufacturer and request a repair or replacement.
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If your UE Boom 2 refuses to turn on, see the [https://www.ifixit.com/Wiki/UE_Boom_2_Won%E2%80%99t_Turn_On|UE Boom 2 Won’t Turn On problem page] for possible causes and solutions.
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It appears it has a two-year warranty. I would contact the manufacturer and request a repair or replacement.