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Example of a damaged pre-MagSafe plug due to being pulled forcefully out of the socket sideways. This strain is severe enough to damage the power socket as well. From Wikipedia, the free encyclopedia. This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Apple Inc. November 8, Retrieved July 9, Retrieved 9 June Retrieved 28 October The Verge.
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Open Menu Close Menu Apple. Your power adapter won't charge the computer.
The LED on the adapter connector doesn't light up when attached to the computer. The adapter only charges the computer intermittently. The adapter's white insulation separates from the magnetic end of the MagSafe connector. Your MagSafe connector on the adapter or computer has debris in the connector. You see a spark. Your Magsafe connector on the adapter or computer has a physical issue with a pin. Troubleshooting Follow these steps to identify the cause of the issue and find out which solutions are available.
If you see a spark Sometimes when you plug the power adapter into the wall, you may see a spark. Troubleshooting power adapter issues Make sure a known good outlet is being used. Make sure the proper wattage adapter for your portable computer is used. Identify line noise issues. If the adapter works after this second "rest", you most likely have a line noise issue with your power source.
You should reset the adapter periodically by repeating this moment of rest. This issue occurs when the AC adapter's "over voltage protection" feature senses ground noise and then turns off the adapter.
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Some possible sources of line noise include lights with ballasts, refrigerators, or mini-refrigerators that are on the same electrical circuit as your computer. This behavior may not occur if you plug the power adapter into an uninterruptible power supply UPS or plug it into a different circuit.
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Unless the adapter continues to exhibit this behavior on a known good outlet, it does not need to be replaced. Be sure you are using the adapter in a well ventilated area The power adapter may become very warm during normal use as heat generated during operating radiates from the adapter's casing. Check for possible AC plug also known as a "duck head" or two- or three-pronged AC cord issues. If the adapter now charges the computer and the LEDs in the MagSafe connector are lit, the AC plug "duck head" or AC cord that was originally in use is no longer functioning and use of that connector should be stopped until a replacement connector is obtained.
Refer to the Learn more section at the bottom of this article for further assistance. If the LEDs do not work or the power adapter does not charge the computer, you should continue troubleshooting using the steps in this Article. Check for strain relief issues or stuck pins and dirty connectors. Follow these tips for best performance of your AC plug or three-prong cable: Before using your power adapter with the AC plug or three-prong cable, verify that the plug is free from foreign objects and debris that may have accumulated since the last time it was used.
Check the AC plug or three-prong cable periodically to make sure it is in good working order, as described in this article. When you store the power adapter, make sure the electrical prongs AC blades on the AC plug are folded for storage. When you use the AC plug, firmly seat the plug with blades folded onto the power adapter, 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 or three prong cable: The AC blades are bent do not straighten a bent blade.
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The AC blades do not lock into place AC plug only. The blades wobble side to side when they are locked in the open position on the AC plug or they seem loose on the three-prong cable. The AC blades have black marks or other visible damage. The adapter does not power on or powers on intermittently when securely plugged into a known-good wall outlet.
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There is visible wear or a break of the insulation on the three-prong cable. Popping sounds from within the AC plug or anywhere on the three-prong cable. Check for strain relief concerns. Example of strain relief on a "T" style MagSafe adapter. For more information about reducing strain relief issues, see the following articles: Apple Portables: Reducing cable strain on your MagSafe power adapter Apple Portables: Tips for using your Apple MagSafe Adapter You should not use power adapters that have strain relief damage or that are missing insulation or rubber.
Check for stuck pins on MagSafe Connectors. For example, the pins on the connector of the MagSafe adapter shown below are stuck down. Checking for and cleaning debris from your MagSafe connectors Be sure to regularly inspect and clean both the MagSafe adapter connector and the power port on your Apple portable computer for dirt or signs of damage. Example of a MagSafe connector on an Apple computer that requires cleaning to remove debris. Check for Software Updates.