The most likely cause is a discharged or defective battery pack.
FIX:
- Remove the battery pack from the tool.
- Connect it to a compatible Milwaukee charger.
- If the charger lights indicate a problem or the pack won't charge, the battery pack is likely defective.
IF THAT DIDN'T WORK: The tool itself could have an internal fault. This is covered by a five-year limited warranty against defects in material and workmanship.
HEADS UP: To get warranty service, you must return the tool freight prepaid and insured to a Milwaukee Service Center or Authorized Service Station. Include a copy of your proof of purchase. Do not attempt repairs yourself, as that voids the warranty.