简介
MacBook Pros are a very common computer that professionals use for various purposes, including use by developers & graphics designers. A common issue that most people come across when working with these computers seems to be charging related issues, including the device seeming to not charge at all (or slowly), or the device seemingly being unable to hold a charge. This guy can help establish exactly what is going on with your MacBook Pro and what steps you can take to resolve charging related issues that you encounter!
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If you are having issues with any device not charging, a logical first step would be to check the outlet you're trying to use. Plug in a phone, lamp, or other chargeable device and see if you're having issues with charging the device with that power supply.
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Alternatively, try plugging in your MacBook Pro to another outlet and see if the problem persists. If not, this will confirm that your issue is the specific power supply/outlet you're trying to use.
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Check for any signs of damage to the charger or cable.
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Obvious signs of a bad charger or cable include physical damage, frayed or nicked wires, and appearing burned. In the case of any of these occurring, replace the charger or cable.
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CAUTION! If you notice the charger or cable burnt, before plugging the replacements in, make sure that the outlet has the correct amount of power your MacBook Pro is rated for. Too much power, or power surges exceeding what a MacBook Pro is rated for could cause your new charger or cable to burn as well.
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Even if there are no observable signs of a bad charger or cable, it could still be bad. If you have a spare of these, use those and see if the spare charges your phone correctly. If so, the one you normally use needs to be replaced.
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Tip: Many chargers consist of a USB-C to USB-C cable that connects the MacBook to a charger. If you find that a second charger correctly charges your phone, try first using the cable of the original with the second charger, then using the cable of the spare with the original charger. This way, you can tell what needs to be replaced.
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Lint, dust, or debris buildup on the port can inhibit a charger's connection to the laptop, causing an incomplete charge. Use either a soft brush or compressed air on the port and then try to charge your MacBook Pro again.
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Go to System Settings ▸ Battery ▸ Battery Health and see if macOS reports a “Service Recommended” message.
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Also check System Information ▸ Power for the charging wattage — if it reads “0 W,” the issue could be the adapter or logic board.
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The SMC handles power management.
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1. Shut down your MacBook.
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2. Hold Control + Option + Shift (left side) for 10 seconds, then press the Power button.
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3. Release all keys and turn your MacBook on normally.
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Go to System Settings ▸ General ▸ Software Update, and see if there is an available update. If so, update your device, restart it, and see if your phone charges correctly.
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Unplug the MacBook and look closely at the chassis and ports.
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Check for dents, liquid stains, or corrosion around the charging port.
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Corrosion usually looks like faint green or white residue.
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If you’ve had any spills, the issue might be corrosion on the logic board.
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Any part that you notice corrosion on needs to be replaced.
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If the previous steps neither solved nor were relevant to your problem, and you do not feel comfortable taking apart and replacing hardware on your MacBook Pro, seek professional help from an Apple Store or an iFixit-certified repair shop.
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Carefully remove the bottom case and look for the following:
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Loose/burned components, discolored connectors, or liquid residue
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Battery connector being improperly seated or damaged.
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Swelling or deformed battery.
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CAUTION! Swollen lithium-ion batteries are a potential fire hazard. If you discover that your MacBook Pro has a swollen or deformed battery, please properly remove and dispose of these in a way where they cannot be punctured or break!
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Disconnect and reconnect the battery connector carefully.
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If you have a spare battery for your MacBook Pro, replace the one it's using and use that. If it charges, the battery originally being used is defective.
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Another sign that it's a defective battery is if the MacBook Pro operates as normal when plugged into the power outlet, but not otherwise.
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Many MacBook Pros (especially older models) have a DC-In board that handles power input.
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Inspect the connector and cable between the DC-In board and the logic board for damage or corrosion.
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If available, test continuity with a multimeter. If there is continuity, your multimeter should beep. If it doesn't, there is no continuity through your DC-In board, and it needs to be replaced.
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Other potential issues it could be:
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Charging IC (chip) failure
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Faulty power management controller (PMIC)
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Motherboard
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These require specialized tools. If comfortable, consult specific iFixit articles for testing and replacing those parts, but if you aren't comfortable doing so, consult professional help.
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To reassemble your device, follow these instructions in reverse order.
