Cordless vacuum will not turn on at all, no lights or response when pressing the power button.

Safety first: Ensure the charger is unplugged before handling the battery. Do not short the battery terminals.

• Step 1 – Confirm battery charge: Place the Tower battery on its charger and verify that the charger LED indicates charging. If there is no LED, try another outlet or charger if available.
• Step 2 – Test with charger connected (fixed‑battery models): On models with non‑removable batteries, connect the charger and see if any lights appear on the vacuum. If there is still no response, the internal charging or control circuit may have failed.
• Step 3 – Inspect power button: Check that the power trigger or button moves freely and is not stuck. On some models, a mechanical linkage can break, preventing the switch from engaging.
• Step 4 – Reseat battery: Remove and firmly refit the battery pack to ensure good contact.
• Step 5 – Replace likely faulty part: If a known‑good battery does not power the unit, the Tower main control PCB or handle switch assembly is likely faulty and should be replaced.