Vacuum will not power on; battery LEDs flash once then turn off

Safety first: Disconnect the charger from the mains before handling the battery. Do not open or puncture the battery pack; SilverCrest Li-ion packs can be hazardous if damaged.

• 1. Check charger output: Plug the original SilverCrest charger into a known-good outlet. Confirm the charger LED turns on. If the charger LED stays off or blinks red rapidly, the charger may be faulty.
• 2. Inspect battery seating: Remove the battery pack from the vacuum (press the release tabs). Check for dust or deformation on the battery rails and contacts in the handle. Clean contacts gently with a dry cloth; do not use liquids.
• 3. Try a full recharge: Insert the battery into the charger or docking station until it clicks. Allow it to charge for at least 3–4 hours. If the charger LED never changes state (e.g., stays red or off), suspect a bad charger or pack.
• 4. Test with another battery (if available): If you have a compatible SilverCrest cordless vacuum battery, insert it into the vacuum. If the unit powers on normally, the original battery pack is likely defective.
• 5. Do not bypass protection: If the battery pack is not recognized or gets very warm while charging, discontinue use. Replace the pack; do not attempt to open or jump-start Li-ion cells.

If the vacuum still will not power on with a known-good battery, the internal power board or main PCB may be faulty and should be serviced by a technician.