⟐ Answered 8월 07, 2023 at 5:20 GMT-7

화면은 나오는데 더 이상 진행되지 않습니다.

방금 보드를 분리하여 memory를 완전히 분리한 뒤 테스트 해봐도

같은 증상 입니다.

어떤 문제가 있는 것일까요?

⟐ Commented 5월 05, 2022 at 22:44 GMT-7

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

I replaced the power supply but no luck (ebay working pull). I am considering replacing the power button next.

It is a 27" 3.4 i7 with 32gb ram and 2gb Vram. Nothing happens when the start button is pressed. It stopped working in February. There were a few crashing that seemed to be related to connecting to wifi before it stopped working.

▪︎are start buttons known for going out?

I'm going to pull the drive and put it in a laptop for the time being: Look at crash report.

Case is still open: monitor is attached but only taped close.

Also if this does start can it run off an external monitor without the screen attached?

It might be easier to work on that way.

Thanks for any help.

(The right speaker is unplugged, I just decided not to remove it.)

Edit: I ordered a replacement PSU and got the same result- a buzzing noise with only LED 1 working. I narrowed down the buzzing to near the top-right of the PSU. Turns out, the buzzing only happens when the computer is attempting to turn on (i.e. after I hold the power button for a few seconds). It stops if I hold the power button for a second or two while it's buzzing. When I remove the PSU data cable, the buzzing I had been hearing stops and is replaces by a higher-pitched buzzing sound that isn't affected by power button presses. (LED 1 still works without the cable, as expected.) I tested each wire in the PSU data cable, and they're all working. I'm thoroughly stumped now.

⟐ Answer unaccepted 8월 10, 2026 at 20:32 GMT-7

Please use the moderation tools to migrate this post to Meta.

Hi everyone,

I'd like to get the community's feedback regarding software-based guides on iFixit, specifically basic operating system navigation guides like "How to do a power option on a Mac."

Since iFixit's primary mission focuses on physical hardware repair, I wanted to ask where the community draws the line for software content. Are basic OS navigation guides helpful and appropriate for the platform, or should software guides be reserved for tasks directly tied to hardware troubleshooting and repair?

Thanks for your input!

⟐ Answer accepted 8월 10, 2026 at 19:41 GMT-7

⟐ Answered 8월 10, 2026 at 14:57 GMT-7

Then it started turning off every 30 seconds, same thing closing display and opening again fixed it. At this point, connecting to an external monitor worked fine. So on the external monitor I could use it like regular (with mirrored or extended screen).

Then I restarted, tried a bunch of things on the https://support.apple.com/en-ca/HT210905 and https://www.macbookproslow.com/fix-black....

I never got into safe mode or knew if things were working, but I tried all the keyboard combinations. Late into the night, it started working and then I used the Macbook regularly, I went to sleep happy that it was fixed.

Now I woke up and the screen is not working at all, not even showing the apple logo which it was last night. Also, it's not working on external monitor either. I can still see the external monitor and the mouse but it's a black background. The backlight is working and the keys and everything seem fine.

Very frustrating and I'm not sure what to do :(

⟐ Commented 8월 10, 2026 at 7:02 GMT-7

⟐ Answered 8월 10, 2026 at 5:35 GMT-7

I got horizontal lines over the display! During the warranty period they replaced the board ( it blacked out ) and now this is happening. They refused to replace the device saying out of warranty and asked to replace it :-|. They were not even sure that changing the display will fix the issue. I am hesitant to replace the screen as I am better off to buy a new one rather keep repairing the faulty product.

Is there any way to fix it?

Tried
- Reinstall the OS
- External Display = Works fine
- Reseating those 3 cables

Lines kind of flickers, may be some lose cables?

Please help

⟐ Commented 8월 09, 2026 at 19:05 GMT-7

I have a OCLP-ed 2012 MacBook Pro with macOS 15.7.8, and it would struggle to connect to the internet, or outright refuse to connect to the internet. Would this be a case of a bad cable connection to the Airport card, or is something wrong with the firmware? Or is the age of the Mac finally getting to the Software? I would appreciate as much help as anyone out there can give out. To add on, I would have to restart the MacBook in order to make it connect to the internet.

Many thanks!

T

⟐ Answer accepted 8월 08, 2026 at 7:31 GMT-7

⟐ Commented 8월 08, 2026 at 3:12 GMT-7

I have MacBook Pro M4 A3112.(Nov'24). this is my first Macbook.

Initially display screen had some damage, so got the screen replaced and i notice both Wifi and Bluetooth has stopped working.

I took back to the repair guy who helped to replace the screen, but he has no clue why Wifi and Bluetooth are not working.

please find the attached the screenshots and photos I took as part of initial diagnosis I could do.

Please advise, what could be the issue and how to resolve this ?

Thanks

RB

Hi @danj

I did reformat whole Macbook and reinstalled OS. Seems issue still persists.

I connected the MacBook to my router using Rj45 cable with the help of connector so I can access wired network connection to internet.

However I tried to do offline diagnostic and I got the error CNW001 . Have attached screenshot.

Power charger wasn't connected to macbook when I ran the diagnostic so the error PPP020 can be ignored in the image here, as I see the MacBook is working fine when charger is connected.

Let me know what option i have to resolve this CNW001 error.

I am using wired connection for Internet for now, not a substantial solution.

Thanks

RB

I used an Ethernet cable and was able to connect to internet.

The pic was taken with ethernet cable on !

⟐ Commented 8월 06, 2026 at 20:15 GMT-7

I’m dealing with a frustrating issue on my MacBook Pro M1 (2021) and could really use some advice. Here’s the problem:

• The issue: The backlight on my MacBook has gone dark multiple times now. When it happens, I can only see the display using a flashlight, so the screen isn’t entirely dead. Sometimes, after doing resets (SMC, NVRAM, etc.) or powering down and restarting, the backlight comes back on, and the MacBook works normally for a few days, but then the issue returns.

• Recent problem: This time, the issue worsened. When I power on the MacBook, it chimes as usual, and the Apple logo briefly appears on the screen before disappearing. After that, it keeps trying to boot but eventually lands on a black screen with an exclamation mark, asking me to restore the backup. The device no longer loads into the startup options even when I hold the power button for recovery mode. I’m seeing all of this using a flashlight because the backlight isn’t coming on at all.

• What I’ve tried: I attempted a DFU restore, but I got a “MacBook can’t be restored, error 2006”. I’ve also had a technician check it out, and he found a circuit shortage in the display and SSD section of the logic board, which he claims to have repaired. However, the backlight issue persists, and now it won’t boot past the exclamation mark screen.

Next steps:

The technician is now considering replacing the display to see if that resolves it. My main concern is whether it’s a display issue or if the problem lies elsewhere, possibly with the logic board or some other component. I’ve heard that issues with the backlight IC or power supply could also cause similar problems, but I’m not sure how to proceed.

My questions:

1. Has anyone experienced similar issues where the backlight randomly cuts out and comes back after resets?

2. Could this still be a logic board issue even though the technician didn’t find anything else wrong after repairing the circuit?

3. If replacing the display doesn’t fix the problem, what other components should be checked (backlight IC, cables, etc.)?

Any advice or suggestions would be greatly appreciated. I’m really hoping this isn’t a permanent issue, and I’d love to hear from anyone who has dealt with this before!

Thanks in advance!

⟐ Commented 8월 05, 2026 at 7:07 GMT-7

I have a Mid 2011 Mac Mini (2.5Ghz i5 model A1347) which I bought from the refurb store in 2013.

From mid 2013 to late 2016 it served as a media server, running XBMC/Kodi. Towards the end of that time it started to randomly shut down. I then stopped using it and since then it's been sat in a cupboard.

I was going to wipe it and set it up for my daughter, but I can't get it started. When I try to start it, the power light comes on and I can hear something (I think it's the HDD) and then about one second later it switches off.

Any guidance on troubleshooting this would be much appreciated.

Thanks

Barry

⟐ Commented 8월 03, 2026 at 14:36 GMT-7

I’m looking for some advice on a 15-inch MacBook Pro 2017 (A1707).

The MacBook suddenly stopped working and now shows absolutely no signs of life. I stripped it down and removed the logic board for inspection. I found what appears to be a burnt component(photos attached).

The marking on the damaged component appears to be:

C21 36 N7 G

Can this component be replaced on its own, or is it more likely that something else has caused it to fail?

Is it worth sending to a repair specialist / can I do it myself or is it dead.

There has been no known liquid damage, and the rest of the board looks visually clean.

I’d really like to save the laptop if it’s economically repairable, and ideally preserve the data that’s stored on the soldered SSD.

Any advice or experience would be greatly appreciated. Thanks!

⟐ Commented 8월 02, 2026 at 14:07 GMT-7

⟐ Commented 8월 02, 2026 at 7:44 GMT-7

Here see the horizontal lines in the Finder icon.

⟐ Commented 8월 02, 2026 at 7:17 GMT-7

So i have late 2013 27 inch iMac. The fan stopped spinning. I installed TG Pro and sure enough it was showing 0rpm.

So i bought a new fan and followed iFixit guide to install it but even the new fan is not working.

What could be the issue here?

I read somewhere that cold solder on fan controller(?) might be the issue. I have attached the image below of the fan connector area. Can anyone help me point out what i could do to fix this without having to go to Apple?

Apple HT shows “there maybe a problem with fan PPF003“

⟐ Commented 7월 30, 2026 at 23:53 GMT-7

⟐ Answer edited 7월 29, 2026 at 19:22 GMT-7