Vacuum will not turn on at all; no lights, no sound, even with the battery installed.

Safety first: Do not attempt to open the battery pack or bypass fuses.

• Verify outlet and charger: Plug another device into the same outlet to confirm power. Check the Insignia charger LED behavior when the battery is connected.
• Charge fully: Place the battery on the charger for the full recommended time (often 3–4 hours). If the charger LED never turns on or blinks an error, the charger or battery may be faulty.
• Try another battery/charger (if available): Swap components to isolate whether the battery, charger, or vacuum is at fault.
• Inspect battery fit: Ensure the battery clicks firmly into the vacuum and there is no play.
• Internal fault: If a known‑good battery and charger do not power the unit, the internal PCB or fuse is likely blown and requires professional service.