Symptoms
- Faint or audible clicking sound coming from inside the adapter
- Clicking happens at a regular interval
- Charging works intermittently along with the clicking
- Adapter also feels warm along with the noise
Likely causes
- CommonInternal protection circuit repeatedly cutting power due to a faultSome chargers click as their circuitry repeatedly attempts and aborts a power cycle when something's wrong internally.
- PossibleOverloaded device drawing more than the adapter can supplyThis can cause the adapter's protection circuit to cycle on and off.
- PossibleAging internal components starting to failCapacitors and other parts can degrade and cause erratic clicking.
- Less commonLoose internal connection vibratingPhysical damage can cause a component to click against the housing.
What to do
- Unplug the device from the charger and listen: if clicking continues with nothing connected, the fault is in the adapter itself.
- Check if the connected device draws more power than the adapter is rated for.
- Feel the adapter for unusual heat alongside the clicking.
- Try the adapter with a different, lower-power device to see if the clicking changes or stops.
- If clicking persists regardless of what's connected, or the adapter feels hot, stop using it and replace it rather than risking further use.
Tools and parts
- None required
Replacement power adapterSearch: “AC power adapter replacement”
When to call a pro
No professional repair for adapter internals; replace a clicking or malfunctioning charger.
Safety
Use caution
Stop using an adapter that clicks repeatedly, especially if it's also warm, since this can indicate an internal fault.