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The battery light is lit but the device is not working

  1. If you have a Game Boy or Game Boy Pocket, first check whether the contrast wheel has been shifted.
  2. If you are using rechargable batteries, or a battery set or power pack from a third-party manufacturer, first test the equipment with new, normal, disposable batteries.
  3. If you are using an original Nintendo battery set or a power pack (AC/DC adapter), please check if there is a defect in that.