The power adapter that comes with iBooks and PowerBooks has an optional AC plug or "duck head." This AC plug is also used in the AirPort Express.
Follow these tips for best performance:
- Before using your AirPort Express or power adapter with the AC plug, make sure that the plug is free from foreign objects and debris that could have accumulated since the last time it was used.
- Periodically check the AC plug to make sure it is in good working order, as described in this article.
- When you store the power adapter or AirPort Express, make sure the electrical prongs (AC blades) are folded for storage, and store the adapter or AirPort Express in a padded bag or container.
- When you use the AC plug, firmly seat the plug with blades folded onto the power adapter or AirPort Express, then snap the AC blades into their completely extended position before you plug the adapter into the power outlet.
If you notice any of the following, discontinue use of the AC plug:
- The AC blades are bent. (DO NOT straighten a bent blade.)
- The AC blades fail to lock into place.
- The blades wobble (side to side) when they are locked in the open position.
- The AC blades have black marks or other visible damage.
- The adapter or AirPort Express does not power on or powers on intermittently when securely plugged in to a known good wall outlet.
- You have heard popping sounds come from within the AC plug.
For more information on troubleshooting portable power adapters, click here.