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[title|MacBook Won't Turn On] | |
- | [summary]Is your MacBook totally dead? Does it lack any signs of life? Are you unable to get power even after charging for hours? Have a look at these fixes |
+ | [summary]Is your MacBook totally dead? Does it lack any signs of life? Are you unable to get power even after charging for hours? Have a look at these fixes![/summary] |
- | There are few electronics problems more disheartening than a device that doesn't power on. Other issues have workarounds |
+ | There are few electronics problems more disheartening than a device that doesn't power on. Other issues have workarounds. But a device that won't power on can't be circumvented. It feels so final like there are only so many things you can try before you write its death certificate and toss it in the trash. In truth, resurrecting a dead MacBook is more like a mystery novel. A few good clues can make all the difference. |
- | == |
+ | == The Basics == |
Before undertaking any of the more time-consuming solutions below, these are a few fundamentals to get you started. | |
- | * Perform a hard reset. Press and hold your power button for about fifteen seconds, then release it. Wait a few seconds, then try to power it on again. |
+ | * Perform a hard reset. Press and hold your power button for about fifteen seconds, then release it. Wait a few seconds, then try to power it on again. |
* Disconnect any peripherals. Docks or multi-port hubs are notoriously problematic, especially if they have many items connected. | |
* [[How to reset the SMC on a Mac|Reset the System Management Controller|new_window=true]] (or SMC). They can clear any incorrect or bad startup settings which are handled by the SMC. | |
* [[How to reset NVRAM and PRAM on a Mac|Reset the PRAM or NVRAM|new_window=true]]. These are terms for a small amount of memory that contains system settings for the Mac. Resetting it may clear a bad setting. | |
* Check for any signs of power. If you're getting any response here, your issue is more likely to be related to a [[MacBook Black Screen|blank display|new_window=true]]. | |
- | ** Trackpad clicks. ***Note:*** This only applies to MacBook Pros 2015 and newer, MacBook Airs 2018 and newer, and all Retina MacBooks. |
+ | ** Trackpad clicks. ***Note:*** This only applies to MacBook Pros 2015 and newer, MacBook Airs 2018 and newer, and all Retina MacBooks. |
** Keyboard lights are on | |
** CAPS Lock LED lights when pressed | |
* Check for visual signs of battery age, swelling, or leak. Swollen batteries may manifest as difficulty in using the trackpad or the keyboard. As the battery expands, it exerts upward pressure on the underside of these components. | |
- | If you need to, you can replace your MacBook battery with a quality-tested unit from our [parts| |
+ | If you need to, you can replace your MacBook battery with a quality-tested unit from our [parts|Mac Laptop|store|itemtype=batteries]. |
== Firmware Corruption == | |
** These boards are full of test points, (the metallic circles scattered across the board). Due to their proximity to the edge of the machine, they are prone to patina, corrosion, or deterioration. | |
** Some of these are purely test points intended to measure the circuit. Others are points where you can tap into an existing electrical path. If the copper has degraded, the line it is on may be broken. | |
- | * [parts| |
+ | * [parts|Mac Laptop|Cables connecting these boards to the logic board|itemtype=cables] may also be at fault. |
{table | |
* MacBook Air is especially prone to this fault. [link|https://www.ifixit.com/Search?doctype=guide&query=Macbook%20Air%20battery|Remove the battery] and check along the edges of the trackpad for signs of liquid. The cable connector here tends to get hit. | |
* If the trackpad has been affected by liquid, clean it up with some isopropyl alcohol and a cotton swab, then retest. | |
- | * The metal contacts on the connectors often take a beating in cases of liquid exposure. Replacement of [parts|Mac|the cable], [parts|Mac|the trackpad|itemtype=trackpads], or both may be necessary. [product|IF145-038|Magnification may be helpful|new_window=true] to determine the extent of the damage. |
+ | * The metal contacts on the connectors often take a beating in cases of liquid exposure. Replacement of [parts|Mac Laptop|the cable|itemtype=cables], [parts|Mac Laptop|the trackpad|itemtype=trackpads], or both may be necessary. [product|IF145-038|Magnification may be helpful|new_window=true] to determine the extent of the damage. |
== Faulty Wi-Fi == | |
=== 2017 MacBook Airs, 2015 MacBook Pros, and Earlier === | |
- | * These models have a dedicated Wi-Fi or [parts|Mac|Airport Card|itemtype=wireless_boards]. Try [link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Airport%20Replacement|removing it] and rechecking for power. |
+ | * These models have a dedicated Wi-Fi or [parts|Mac Laptop|Airport Card|itemtype=wireless_boards]. Try [link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Airport%20Replacement|removing it] and rechecking for power. |
* Be sure to note the order of the antenna cables when you disconnect them. It is not always intuitive. | |
* If you do get power, reconnect the cable and disconnect the drive itself to isolate the problematic part. Replace whichever part results in no power when connected | |
** You may want to replace the cable regardless if you have a 2012 Unibody MacBook Pro due to its notoriety for failure. | |
- | * Replacing your existing HDD with a [product|IF107-132|Solid State Drive|new_window=true] is a great way to give your aging Mac a speed boost, even if you determine it's not the issue. |
+ | * Replacing your existing HDD with a [product|IF107-132|Solid State Drive|new_window=true] ([parts|Mac Laptop|SSD|itemtype=storage]) is a great way to give your aging Mac a speed boost, even if you determine it's not the issue. |
=== Retina 2012-2015 MacBook Pros and 2010-2017 MacBook Airs === | |
== Faulty Logic Board == | |
- | The logic board is the hub for the vast majority of a MacBook’s functionality. Any number of the small components on the board may have failed or become damaged. Logic board fault is a safe assumption of cause if nothing else on this page has worked. |
+ | The [parts|Mac Laptop|logic board|itemtype=motherboards] is the hub for the vast majority of a MacBook’s functionality. Any number of the small components on the board may have failed or become damaged. Logic board fault is a safe assumption of cause if nothing else on this page has worked. |
* Check for obvious signs of a board issue - burned or cracked components, liquid residue, corrosion, or bend. If there are signs of liquid, [link|https://www.ifixit.com/News/41383/ask-ifixit-i-spilled-liquid-on-my-laptop-now-what|there’s still hope your Mac can be resurrected]. | |
* If you’re feeling especially curious, the tiny components on the board can be repaired with microsoldering. It is an art unto itself, but a worthy endeavor. If you’re curious and want to know more about getting into micro soldering, here’s [link|https://www.ifixit.com/News/6911/micro-soldering-mom|some good reading] and [link|https://www.youtube.com/playlist?list=PL4INaL5vWobD_CltiZXr7K46oJ33KvwBt|some good watching] to get you started. | |
[comment]conclusion[/comment] | |
+ | |
+ | == About the Author == |
+ | |
+ | Despite holding an ACMT certification (or maybe specifically because of this), the MacBook I’m writing this on is cobbled together from at least three separate machines and the touchpad is entirely the wrong color. I think this says everything you need to know about me as a Mac technician. |
== Related Pages == |
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