1 MacBook Pro 13" 2017 won't boot from battery
Primary problem is that after replacing a very tired battery with a replacement from iFixIt, my laptop will not boot from battery anymore. It gets to about 40% of the progress bar and fails. When booting with the power cable in, the screen flashes brighter at this point, before continuing to complete the boot cycle.
I have removed, cleaned and reseated the connections for the battery board to the motherboard, but this has not helped.
Coconut Battery reports that my 'new' iFixIt battery was made in Nov 2013, making it twice the age of my laptop! It also says that is capable of only 64% of it's design capacity.
Have tried multiple SMC resets and a full factory OS reinstall, but no change to these 2 core issues.
I'm thinking I either have a dodgy connection to the motherboard or a dodgy replacement battery, but I'm not sure how to determine which it is?
Suggestions welcome!
Adding images showing Coconut battery readout with and without power. Potential capacity at full charge is showing a much higher figure than earlier today, albeit still poor for what should be a new battery. I have been seeing wildly varying figures for % of design capacity it thinks it can achieve.
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3条评论
Can you post the CoconutBattery snapshot so we can see 在已经存在的问题里加入图片 This sounds like a defective battery.
由 Dan 完成的
Screenshots posted Dan. Thanks for looking.
由 Jane 完成的
In the case of macOS laptops, here is what to do if your MacBook Pro won’t turn on.
1. Check for Black/Blank Screen
MacBook Pro on a desk
When you initially tried to turn on your MacBook Pro, did it not turn on at all, or did the screen stay black?
A black screen is a common problem for laptops and is not restricted to Apple. Before you do anything else, ensure you didn’t accidentally set the brightness to zero.
There are two keys along the top of the keyboard with sun icons on them. One is to darken the display, and the other is to brighten it. Although most laptops won’t go black with this setting, it still needs to be confirmed. If the brightness does not affect the black screen, move on. Turn off the laptop, remove all attached peripherals, and turn it on again while listening carefully.
Do you hear any whirring? Any beeps? Fan noises? If you hear something but see nothing, it may be the screen, not the laptop. If you hear nothing, you need to troubleshoot further.
2. Boot to Recovery Mode
If you hear noises and receive feedback while performing actions, but the screen is black, you can try to boot the MacBook into Recovery Mode to repair any issues it’s having.
To boot into Recovery Mode, press the Command + R keyboard combination. If this action works, you should see the macOS utility screen. MacOS Utilites
If Recovery Mode was successful, reboot your MacBook, and it should start normally. If not, continue reading; there may be other issues.
3. Check Power Connections
MacBook Pro charging
Plug your MacBook Pro charger into the laptop and the wall socket. Verify both connections are tight. Ensure the power cord isn’t damaged. If nothing happens, try a different wall socket or check the one you’re using with another device.
If the outlet works, check the power cord or adapter. If you’re fortunate enough to have a spare of either, try them. If you can borrow a spare for five minutes, do that. If the laptop still doesn’t work with a different charger, continue troubleshooting.
Note: The charger used should match the specs of the OEM charger for your specific model.
Make sure that you’re using Apple-branded cables if possible. Some third-party charging cables do not have the correct amperage needed to power your device correctly, or the wires are brittle inside and could be damaged. Using the cable and charging block that came with your device may be the trick to getting your computer turned on.
4. Perform a Power Cycle
The next step involves performing a complete power cycle of your MacBook Pro. Although this may seem counterintuitive, this is a simple solution that works most of the time.
All you need to do is plug your MacBook into its charger and hold down the power button for a minimum of ten seconds. This action cuts all power to the laptop and is the equivalent of removing the battery. You may hear a noise as you do this.
Once you have held down the power button and released it, leave it off for a few seconds and then press it again to start the MacBook Pro as usual. MacBook Pro Power Cycle
If you’re fortunate, it will boot successfully. If not, the MacBook Pro will still fail to start, and you’ll need to keep reading.
5. Reset the SMC
MacBook Pro SMC Reset
The SMC is the System Management Controller. It manages all the low-level functions of the Macbook Pro, such as the power button, display, battery, fans, motion sensing, keyboard, indicator lights, and other similar elements. Resetting the SMC is usually left until last as it resets many settings back to their defaults. If you have gotten this far without a successful boot, try resetting the SMC on your MacBook Pro.
Unplug the laptop from the charger and peripherals.
Hold down Shift + Control + Option and the power button for ten seconds.
Let go of all keys and reconnect the charger.
Then, press the power button to boot your laptop.
If an SMC error was causing the MacBook Pro not to boot, it should now boot normally. You will have to reconfigure some hardware settings once it successfully starts up, but it is a small price to pay for getting your laptop working again. This setback is undoubtedly better than professional maintenance, which takes time and costs money.
Regards,
Rachel Gomez
由 rachel gomez 完成的