Mac mini late 2014 don’t turn on

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2014 年末Mac mini

于 2014 年 10 月 16 日发布，型号为 A1347 和 EMC 2840。

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Andres A @andresa98546

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发帖于: 2021年12月5日

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Mac mini late 2014 don’t turn on

hello my mac mini from late 2014 is dead, after pressing the power button it does nothing, I already tested the power supply with another motherboard and it works, does anyone have any idea of the motherboard components that should I check?

here I upload the photos of the motherboard:

Here I send the photos of the area where I smell burning, this happens when connecting the power cord to the power supply:

I need instructions to know what components I should test with the multimeter

I just found out that it is the processor that broke:

could at least take advantage of the ram memory and solder it on another board?

Hello, a friend has given me a motherboard that has a good processor but does not turn on, I have seen that this has a burned component, I will try to change it for the other motherboard to see if I can revive this

motherboard pictures:

component burned to change:

I just realized that the board that has the burned component is BNW 6OAC and the other one I have as a spare is BNW 7CAA I suppose they will not be compatible

Does this motherboard have a fuse that I should check?

I just found another component in poor condition, in total it would only be 2 components that can be seen with the naked eye, I have not found more

tomorrow I will try to change them and test the motherboard

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Hello, thank you very much for your answer, I already tried that type of test, but when the motherboard clicks the power button it does nothing, it does not turn on or the start light that these mac minis have in front of them and neither does the fan move or hard disk or anything, it is completely dead, as if it did not receive power, after pressing the power button several times I have noticed that it smells a little like a burned component, but externally I have not found any part that looks burned or anything

由 Andres A 完成的 2021年12月6日

I already uploaded more photos of the motherboard

由 Andres A 完成的 2021年12月8日

@Andres A - I would take the heatsink off so you can see how the CPU looks. I've seen a few fracture from overheating.

由 Dan 完成的 2021年12月8日

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Dan @danj

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发帖于: 2021年12月8日

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Sorry ;-{

As soon as you said smell I had a feeling.

Not sure if desoldering the RAM chip offer anything here as depending on what you have may not work in the other system. I’ve got two boards which I use to steal parts from to fix other systems. You might be able to get some value for parts

If you decide to replace the logic board here’s a listing of the P/N’s:

1.4GHz i5 16GB/Intel 5000 - 661-01023
2.6GHz i5 16GB/Iris 5100 - 661-01024
2.8GHz i5 16GB/Iris 5100 - 661-01557
3.0GHz i7 16GB/Iris 5100 - 661-01026

They range in price from $270 to $410 USD for the i7 board.

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Thank you very much for your answer, I will change the motherboard finally

由 Andres A 完成的 2021年12月10日

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Hello, thank you very much for your answer, I already tried that type of test, but when the motherboard clicks the power button it does nothing, it does not turn on or the start light that these mac minis have in front of them and neither does the fan move or hard disk or anything, it is completely dead, as if it did not receive power, after pressing the power button several times I have noticed that it smells a little like a burned component, but externally I have not found any part that looks burned or anything — Andres A
@Andres A - I would take the heatsink off so you can see how the CPU looks. I've seen a few fracture from overheating. — Dan
Thank you very much for your answer, I will change the motherboard finally — Andres A

Alisha C @flannelist 声誉积分: 32.6千 24 35 32 · Answer 1 · 2021-12-16T13:08:16-07:00

Alisha C @flannelist

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发帖于: 2021年12月16日

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The component that looks bad in the pictures, is likely equivalent to the one on your original board. If it's the same model, and the board numbers match, I would wager they would be interchangeable. Just might have a different part number, but is still compatible.

I can see the board number on the new one, along the edge of the board near the short side of the shield covering the RAM. Which is 820-5509 (at least that's what it looks like, it's hard to see in the picture for sure). If the other board is also an 820-5509, then should be fine. I’m not sure what that specific part is. But bear in mind the fact that it failed, may indicate other failures on that same line.

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thanks for your answer, tomorrow I will try to change the components

由 Andres A 完成的 2021年12月16日

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2014 年末Mac mini

Mac mini late 2014 don’t turn on

Update (12/16/2021)

Update (12/16/2021)

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