Macbook pro A1708 820-00840 not turning on

[resistor83]

hi everyone, i have this macbook 13 "A1708, motherboard 820-00840-A.
A few months ago I smelled a slight burning smell coming from the right side of the keyboard. I didn't give it much weight, the macbook had no problems.
From 3 days it is no longer turning on, I removed the motherboard and there seems to be a burnt capacitor in that area.

can you tell me what i could do first?

Thanks

[mon2]

Re: Macbook pro A1708 820-00840 not turning on

Desolder that capacitor and power up again. The part should not be missed if you decide to use as-is (without this capacitor) but in general, replace with a valid replacement.

33uf 16volt tantalum Case B1 size

Here is a valid cross:

https://www.mouser.ca/ProductDetail/...qMcZ4kIQ%3D%3D

There are many such parts in the market - the more you pay, the lower the ESR and other features. Lower ESR = higher current support for that power rail. Note that there are numerous capacitors on the rail so each will carry the burden of the current support - much like a group of us lifting a car - it can be done. But by yourself, it will be difficult or impossible...unless you are Arnold.

[resistor83]

Re: Macbook pro A1708 820-00840 not turning on

thank you, it worked.

Just one question: I removed the capacitor but I don't understand if the circled area red is part of the capacitor or the motherboard pad

so i have to remove it?

[mon2]

Re: Macbook pro A1708 820-00840 not turning on

Looks to be the exposed pad of the circuit board. The large rectangular shape is the landing pad for the component = your capacitor. If you scrape enough, the top coating = hot air solder leveling will be removed and will expose the copper trace that does the real job of connecting to other traces.

As long as the part can be soldered onto the landing pads (one for each side of the part) - you are good to go !! Do not worry about the small piece of exposed copper.

Well done on the repair !!

[resistor83]

Re: Macbook pro A1708 820-00840 not turning on

Thank you mon2!

I wanted to buy the capacitor from the site you gave me.
I live in Italy and for a € 0.77 condenser I have a delivery of € 20 with fedex, it seems a bit too much.

Do you know any other site that sells this product in europe or china?

[mon2]

Re: Macbook pro A1708 820-00840 not turning on

Yes, AliExpress will have them but the mainstream vendors use a branded capacitor. So we can confirm with the datasheet if the part can handle the peak current or not. In China, unless you work with the manufacturer, it is hard to believe the specs the vendor states.

Let me check and post back with options later today.

[resistor83]

Re: Macbook pro A1708 820-00840 not turning on

thank you very much, I await your news

[mon2]

Re: Macbook pro A1708 820-00840 not turning on

here are some suggestions:

1) install the app for the Aliexpress website or goto aliexpress.com website with your browser

2) search for '33uf 16v tantalum B' keywords to locate this component in the 'B' size so that the component will land on the 2 soldering pads on the PCB.

3) found a well received store here:

https://www.aliexpress.com/item/1005...24123390%7Csea

< see attached >

4) Option # 1 - you could order from the above store or another as your choice.

Option # 2 - (we have done this in the past many times) - share the above details with the store that has the mosfets & charger IC - ask if they can source this part or replacement. Sometimes you can do this and the benefit is that the single store will ship all of the goods so you could save on the 2 different shipping fees.

[resistor83]

Re: Macbook pro A1708 820-00840 not turning on

thank you!