MacBook Pro Charges When Off, But Not When On

Question

MacBook Pro 15インチ Retina Display Mid 2015

2.2 GHz (Turbo Boost使用時最大3.4 GHz), 2.5 GHz (Turbo Boost使用時最大3.7 GHz)もしくは2.8 GHz (Turbo Boost使用時最大4.0 GHz) L3キャッシュで6 MBのクアッドコアIntel Core i7プロセッサ

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Itsmeapple @itsmeapple

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投稿日: 2025年2月16日

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MacBook Pro Charges When Off, But Not When On

Hello everyone,

I’m facing an issue with my MacBook Pro. When it's switched off, it charges while the battery is connected. However, when it’s powered on, the charging stops after a few seconds.

Another strange thing is that when I disconnect the battery and plug in the charger, the MacBook Pro turns on and runs without any issues.

I’ve already tried using a different OEM charger, but no luck. I even swapped the charging port, but the problem persists.

Has anyone else experienced this issue before?

Thank you! :)

Battery disconnected and charger connected. MBP running

Battery connected and charger connected. MBP Turned OFF and it is still charging without an issue.

@danj sorry i had no option to upload images by commenting.

Charger connected but not powered on (System start) Battery 77.2%

After 3min charging on

After 10min charging on

After 11min charging stopped

System shut down, Had to switch off and on the charging cable to get it to work again and disconnect from the machine. Now the system is off and charger reconnected.

Restarting the system and when the boot screen came on charging stopped again.

After restart the system and and the charging stoped.

After 2-3 min automatically start to charge again with the amber light on so i let it charge for about 5+ min

After 5+ min charging light turns green

MBP system battery info showing the battery is fully charged.

Update:

After about 30-40min finally it is showing 100% charge

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What is CoconutBattery telling you? I can’t see the logic doing this if the system is fully working as designed. Testing without the battery won’t be a valid test.

Dan さんによる2025年2月16日

Coconut battery showing battery is normal even i replace it with a different battery both battery is in good condition.

When the battery is connected system work flawlessly but if i try to connect the charger it charge for few seconds then stop charging. amber light on the charger turn off no more indication.

if i shut off the mac and connect the charger it will charge without any issue.

Itsmeapple さんによる2025年2月16日

@itsmeapple "I’ve already tried using a different OEM charger" what charger did you try and what charger do you have right now? After you changed the port, did you checked the voltage and amperage on your magsafe board connector to see what was the amperage draw from your power supply?

oldturkey03 さんによる2025年2月16日

@itsmeapple - Can you please post a set of snaps of CoconutBatteries main window with the charger plugged in after you’ve allowed the Battery to discharge a bit (charger not connected) let’s say about 80%. Then plug in the charger and take a second snap after waiting a few minutes so Coconut has had a chance to be refreshed. Let it charge as you would with the system is running or just with the display turned off (with the charger still connected) now take a third snap around 30 minutes after the last. Now shut the system down let it charge up and restart the system and take the last snap. Make sure to label each snap so,we don’t get confused.

Dan さんによる2025年2月16日

@oldturkey03 85W Magsafe 2 Charger. no i didn't check about the amperage bcuz i'm not expert in this :(

Itsmeapple さんによる2025年2月16日

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What is CoconutBattery telling you? I can’t see the logic doing this if the system is fully working as designed. Testing without the battery won’t be a valid test. — Dan
Coconut battery showing battery is normal even i replace it with a different battery both battery is in good condition.

When the battery is connected system work flawlessly but if i try to connect the charger it charge for few seconds then stop charging. amber light on the charger turn off no more indication.

if i shut off the mac and connect the charger it will charge without any issue. — Itsmeapple
@itsmeapple "I’ve already tried using a different OEM charger" what charger did you try and what charger do you have right now? After you changed the port, did you checked the voltage and amperage on your magsafe board connector to see what was the amperage draw from your power supply? — oldturkey03
@itsmeapple - Can you please post a set of snaps of CoconutBatteries main window with the charger plugged in after you’ve allowed the Battery to discharge a bit (charger not connected) let’s say about 80%. Then plug in the charger and take a second snap after waiting a few minutes so Coconut has had a chance to be refreshed. Let it charge as you would with the system is running or just with the display turned off (with the charger still connected) now take a third snap around 30 minutes after the last. Now shut the system down let it charge up and restart the system and take the last snap. Make sure to label each snap so,we don’t get confused. — Dan
@oldturkey03 85W Magsafe 2 Charger. no i didn't check about the amperage bcuz i'm not expert in this :( — Itsmeapple

Dan @danj 評価: 489.3千 Self employed contract worker 35 338 973 · Answer 1 · 2025-02-16T15:56:37-07:00

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Dan @danj

評価: 489.3千

Self employed contract worker

35

338

973

投稿日: 2025年2月16日

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@itsmeapple - I do wonder if the battery is good, if you look through the snaps the batteries temp does look a bit high during charging and SMC will lower the power as well as shut down the charging until the battery cools down.

I would inspect the MagSafe port making sure the contacts are clean as well as the hollow as junk can mess up the connection. The middle pin is the one-wire comm connection which maybe failing to connect. You might want to replace the MacBook Pro 15" Retina (Late 2013-Mid 2015) MagSafe 2 DC-In Board sometimes the insulator warps so the connection is not firm. If the MagSafe plug seams a bit warm when the MagSafe LED goes out that’s a good clue.

Replace a broken or damaged MagSafe 2 DC-in board for your Late 2013 to Mid 2015 MacBook Pro 15" Retina laptop with this part. This part connects the wall adapter power to the logic board.の画像

製品

MacBook Pro 15" Retina (Late 2013-Mid 2015) MagSafe 2 DC-In Board

$29.99

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@danj Thank you. i will try to follow these steps and see. will keep you all updated.

Itsmeapple さんによる2025年2月16日

Hi @danj Quick question:

1) If the DC-In board cuts off the charging, will it affect the charger itself? I’m asking because whenever my MacBook stops charging, I have to unplug the charger from the main power outlet and reconnect it for the charger to work again.

2) Also why is this happening only when the MBP is running? if it is shut down it continue to charge without any issue.

Itsmeapple さんによる2025年2月17日

@itsmeapple - If the one-wire comm link is lost then the charger doesn’t know what to do, so it’s reasonable for the charger to shutdown. Sadly, different makers of chargers did different things so I can’t say for sure if yours is working correctly or not.

While from the outside a real Apple unit will look like the others, the internals can be very different. In fact one of my employers workers forgot theirs and grabbed one at a local shop. Plugged in his laptop went to dinner only to find his hotel room a smoky mess and the company was sued for 2 million by the hotel! As the charger was the cause of the fire.

Dan さんによる2025年2月17日

@danj I got you.

Here is the update of what i did so far. Removed the old DC-In Board and put a new one and now the charger is on and off kinda looping. I've add a video to my main question you can see it in action if you get a time.

Thank you.

Itsmeapple さんによる2025年2月18日

@itsmeapple - Sorry, the vid is not playable for me the iFixit server has issues with some vids.

Dan さんによる2025年2月18日

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MacBook Pro 15インチ Retina Display Mid 2015

MacBook Pro Charges When Off, But Not When On

Update (02/16/25)

1 件の回答

MacBook Pro 15" Retina (Late 2013-Mid 2015) MagSafe 2 DC-In Board

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