Hello. I am John Schindler.

I replaced the battery of my MacBook Pro today, but a 'service recommended' message appears.

In the Coconut Battery program, the battery life is 100% and there are no problems.

Is there any way to solve the symptom of this problem?

Korean

안녕하세요. 저는 존쉰들러입니다.

오늘 맥북프로 배터리를 자가교체를 했지만, '서비스 권장됨' 안내표시가 뜹니다.

코코넛 배터리 프로그램에서 배터리 수명이 100%이고 별 문제가 없어보입니다.

이 문제의 현상을 해결할 수 있는 방법이 있습니까?

image

⟐ Commented 5월 28, 2026 at 17:27 GMT-7

I’ve tried entering DFU mode and it did not work.

There is no sound, and the display does not turn on at all. I had exactly the same issue with a slightly older MacBook, it really seems like this is a systematic issue. Does anyone have an idea if this is true and a possible fix?

⟐ Commented 4월 26, 2026 at 13:09 GMT-7

⟐ Commented 4월 13, 2026 at 16:54 GMT-7

⟐ Commented 2월 24, 2026 at 2:36 GMT-7

⟐ Commented 2월 21, 2026 at 16:13 GMT-7

Recently I changed the hard drive cable in my mid 2010 15" MBP (2.66GHz i7) after breaking it. I bought it from iFixit and it included a replacement SIL assembly. After replacing the part the cable works (hard drives boot when installed internally) but the SIL still doesn't work. I've reset the PRAM and SMC.

Does anyone have any ideas?

Thanks in advance

⟐ Commented 2월 08, 2026 at 4:09 GMT-7

⟐ Commented 12월 05, 2025 at 17:00 GMT-7

The pad via's have continuity with the via's to the corresponding test points

The problem is the laptop charges, works fine on battery power, but there is an X over battery, and does not give charge or % data. Im assuming a data line for battery status is having an issue somewhere.

Any one have any advice where I can look next? Im all out of ideas ;o/

Attached is the corresponding schematic area of the logic-board

Hi OT, sorry for bad photo. The original photo was before any work was done. the pads were in fact bridging, but here is the rework. the only pads not connected are the back legs, which are presumably to ground pad, but schematic reads No Connection.

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Here is the reworked version

⟐ Commented 11월 16, 2025 at 9:16 GMT-7

My fans are constantly running and they said it could be the sensors i'm wondering if it's worth to take off the logic board and check the little circuit underneath the logic build connecting to the fans?

The fan ribbon adapter on the top of the logic board was all fine and it really does not seem any water damage around any circuits etcetera considering there was a lot from a bucket falling

So the question would be should I bother taking a logic board off to check if the circuit connect to the fans underneath has a little corrosion Or does anyone think it's just sensors in general any help would be greatly appreciated?

have tried resetting smc and different power supplies

⟐ Commented 10월 20, 2025 at 14:00 GMT-7

What I've tried:

• Charged for 3 hours via USB-C
• Tried external monitor (no output)
• SMC reset attempt (hold power 10 seconds)
• All key combinations for recovery mode

Diagnostics so far:

• When plugged into USB-C power bank, one port draws 3-12W (varying/cycling), the other ports only 0.1-0.3W
• No response to any key presses
• No startup chime, no display output on internal or external monitor
• Power draw pattern happens automatically when plugged in (seems like boot loop?)

Opened it up (followed iFixit guide):

• No visible water damage or corrosion
• Battery connector logic board side: 1.5V
• Battery side: 0.0V (completely dead battery?)
• Tried booting with battery disconnected - same behavior

Questions:

1. Could the dead battery be preventing boot even with external power?
2. Is this likely a logic board issue?
3. Why is the battery showing exactly 0V? Isnt that weird?
4. Worth trying anything else before taking it for professional repair?

The machine looks pristine physically, so I'm hoping it's fixable. Any insights appreciated.

⟐ Commented 10월 06, 2025 at 9:53 GMT-7

On a side note, I knocked something loose. I'll attach it here to see of it's a part of the problem or maybe related to the touch bar issue

At this point I'm all out of ideas, so any advice would be helpful.

⟐ Edited 9월 03, 2025 at 17:08 GMT-7

⟐ Commented 8월 26, 2025 at 0:34 GMT-7

⟐ Edited 8월 23, 2025 at 11:24 GMT-7

⟐ Commented 7월 16, 2025 at 1:01 GMT-7

MacBook Pro 14″, late 2024 (M4, base model)

• Tea spill on keyboard ~4 months ago. Local shop did a cleaning - no parts replaced. Machine has worked perfectly since.
• Battery still healthy; macOS Sequoia.

Current symptoms:

1. If I power up on battery alone, the Mac runs normally (until it dies from low battery).
2. As it's low battery, when I power up I get a message that displays the "runs on reserve battery life" and the macOS first shows the yellow-triangle “The version of macOS on the selected disk needs to be re-installed” screen. When I click Recovery → Reboot the macOS from Recovery, the Mac runs normally .
3. The moment I attach any external power—Apple 140 W brick + MagSafe 3, or known-good 96 W brick over USB-C, or USB-C on the opposite side—the MagSafe LED blinks amber for ≈1 s and the whole laptop shuts off. Same behaviour on both USB-C ports.
4. Reconnecting the charger while the Mac is off causes a brief blink, then nothing. Unplugging the charger lets me boot again on remaining battery.
5. Tried three different chargers and two MagSafe 3 cables; cleaned all ports with 99 % IPA; let it dry 24 h—no change.

What I’ve ruled out / measured:

• Charger and cable (swapped).
• MagSafe DC-in board (visual inspection—looks clean, no charred pins).
• Battery fuse appears intact (machine boots on battery).
• Liquid-detection lock doesn’t match the hard power-off I’m seeing.

Suspicions from research:

• Faulty RAA489900/RAA489901 charger IC (U7200) or shorted PPBUS bulk cap.
• Less likely but possible: both CD3219/3220 USB-C PD controllers or the ideal-diode MOSFET pair.
• Repeated hard shut-offs are probably what corrupted the Signed System Volume and trigger the yellow-triangle screen.

Goal:

Figure out the issue and whether a U7200 re-chip (or cap swap) is worth attempting if that's the cause.

Thanks in advance for any schematics, voltage points, or hard-earned wisdom you can share!

⟐ Commented 7월 12, 2025 at 6:42 GMT-7