Will not turn on at all, charger shows a green light.

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MacBook Pro 13" Retina Display 2015 상반기

MacBook Pro 13" Retina Display, 모델 A1502의 2015년 3월 업데이트는 5세대 Intel Core i5 및 i7 프로세서를 포함하며 Force Touch 트랙 패드를 소개합니다.

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Rose R. @brokegirl

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게시일: 2020년 10월 14일

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Will not turn on at all, charger shows a green light.

I have a MacBook early 2015 Retina display. It was on 100% and had been plugged in and was charging, it reached 100% and I kept it in charging for a little bit. I was in the middle of a video conference when it suddenly turned off and now will not turn back on.

There is no water damage. I can reset the smc or reset any thing else because the Mac just won’t turn on. I tried unplugging and replugging the battery. Still no dice. I had replaced the battery maybe 3/4 months ago. And it worked fine afterwards, up until this point.

So far I’ve tried:

1 - pressing and holding the power button for 10+ seconds.

2 - unplugging battery, waiting about a minute, and then replugging it.

I don’t know what else I could do? The power cable, when I plug it in shows green. The battery has charge, but the computer just won’t turn on. No sounds, nothing turning on at all.

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Zach @zpl

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I would recommend removing the bottom plate, disconnecting the battery, and then connecting the charger with the battery still disconnected and the bottom plate removed (you may need to set the computer on its side). Now press the power button. Do the fans move at all? If you don't get signs of life at this point you probably have an issue with your logic board or the MagSafe 2 board. You can use a multimeter to read the voltage being passed by the MagSafe 2 board to see if it’s normal. If it’s abnormal you may need to replace your MagSafe 2 board. If that ends up being the case, follow this guide. Hope this helps!

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Okay so it might be an issue with the MagSafe connector. The computer doesn’t turn on at all when battery is disconnected. The MagSafe connector is now orange when I connect it.

I did notice my MagSafe connector used to get super hot before my computer died. The 2nd and 4th pin on the receiving end on my computer are completely burnt. Doesn’t this hint at a problem with the MagSafe connector and the computer Charging port? I don’t have a way to measure the voltage but a new MagSafe board is like $30 here and I’m more than willing to take the shot to see if it’ll work. Is it a bad idea to do this?

I’m really praying this isn’t a logic board issue because having to repair the whole thing is too expensive considering it’s a fairly old computer.

Also, could you tell me what the volts should read out to? What’s normal and what’s abnormal?

Rose R. 의 2020년 10월 15일

The 2nd and 4th pins are the pins which carry the main power through the MagSafe board to the logic board. If they are burnt it probably means there was a short or a surge that cause more voltage than normal to be passed through the pins. I would definitely recommend trying to replace the MagSafe board if you can do so cheaply! For your model it should be passing 16.5 V DC through the MagSafe board. If it's significantly more or less than this there is a problem.

Zach 의 2020년 10월 15일

Here's a useful Wikipedia page which explains the voltages and function of the pins and their arrangement. https://en.wikipedia.org/wiki/MagSafe_(M...)

Zach 의 2020년 10월 15일

Okay, so I went to Apple Genius Bar. The guy said they won’t fix it because I replaced the battery myself 3ish months ago (typical). He said he doesn’t think it’s the MagSafe board because “the charger still lit up and changed colors” when they plugged in their own charger it changed from green at first, to amber. But the 1, 3, and 5 pins are fine? The middle, 3rd, pin is what your wiki article says is the “data pin” which looks like it works fine. This is the pin that determines the led color so of course it’s going to work fine. Not all components of the board need to fail for the board to be considered defective. The grounding pins look fine too, the power pins however (on the MagSafe board in the mac) they look fried and dead. I suspect that the case is that the voltage being sent out is incorrect and this is preventing the computer from turning on.

^ do you think this is a logical conclusion to come to? The Apple genius bar just told me to toss it and buy a new Mac, I’d like to repair it if possible and my line of reasoning for still thinking it was the MagSafe board is that it’s JUST the 2nd and 4th pin burnt out.

Rose R. 의 2020년 10월 16일

@brokegirl I think that's a logical conclusion! There's a chance there is still a main logic board problem, but it will be hard to know conclusively without first replacing the MagSafe board.

Zach 의 2020년 10월 19일

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Okay so it might be an issue with the MagSafe connector. The computer doesn’t turn on at all when battery is disconnected. The MagSafe connector is now orange when I connect it.

I did notice my MagSafe connector used to get super hot before my computer died. The 2nd and 4th pin on the receiving end on my computer are completely burnt. Doesn’t this hint at a problem with the MagSafe connector and the computer Charging port? I don’t have a way to measure the voltage but a new MagSafe board is like $30 here and I’m more than willing to take the shot to see if it’ll work. Is it a bad idea to do this?

I’m really praying this isn’t a logic board issue because having to repair the whole thing is too expensive considering it’s a fairly old computer.

Also, could you tell me what the volts should read out to? What’s normal and what’s abnormal? — Rose R.
The 2nd and 4th pins are the pins which carry the main power through the MagSafe board to the logic board. If they are burnt it probably means there was a short or a surge that cause more voltage than normal to be passed through the pins. I would definitely recommend trying to replace the MagSafe board if you can do so cheaply! For your model it should be passing 16.5 V DC through the MagSafe board. If it's significantly more or less than this there is a problem. — Zach
Here's a useful Wikipedia page which explains the voltages and function of the pins and their arrangement. https://en.wikipedia.org/wiki/MagSafe_(M...) — Zach
Okay, so I went to Apple Genius Bar. The guy said they won’t fix it because I replaced the battery myself 3ish months ago (typical). He said he doesn’t think it’s the MagSafe board because “the charger still lit up and changed colors” when they plugged in their own charger it changed from green at first, to amber. But the 1, 3, and 5 pins are fine? The middle, 3rd, pin is what your wiki article says is the “data pin” which looks like it works fine. This is the pin that determines the led color so of course it’s going to work fine. Not all components of the board need to fail for the board to be considered defective. The grounding pins look fine too, the power pins however (on the MagSafe board in the mac) they look fried and dead. I suspect that the case is that the voltage being sent out is incorrect and this is preventing the computer from turning on.

^ do you think this is a logical conclusion to come to? The Apple genius bar just told me to toss it and buy a new Mac, I’d like to repair it if possible and my line of reasoning for still thinking it was the MagSafe board is that it’s JUST the 2nd and 4th pin burnt out. — Rose R.
@brokegirl I think that's a logical conclusion! There's a chance there is still a main logic board problem, but it will be hard to know conclusively without first replacing the MagSafe board. — Zach

MacBook Pro 13" Retina Display 2015 상반기

Will not turn on at all, charger shows a green light.

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