Macbook Pro 13'' - A1989 stuck at 5v

nosinformatica

Mai Piangere

Join Date: Sep 2023

Posts: 2

Country: Italy
#1

Macbook Pro 13'' - A1989 stuck at 5v

09-29-2023, 06:29 AM

Hi,
Preface : My primary job it's not repairing logic board, so please excuse me.
The Macbook A1989 is stuck at 5v at 0.3A on three usb-c port, and in one port no absorption, so the incriminated chip may be the CD3125.
I'have read that these mac have two CD3125 in daisy chain.
How can i confirm my diagnose before reballing it? Someone have experience with this issue?
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mon2

Badcaps Legend

Join Date: Dec 2019

Posts: 13870

Country: Canada
#2

09-29-2023, 07:49 AM

Re: Macbook Pro 13'' - A1989 stuck at 5v

Does the meter jump to this current draw value or does it climb up to this value?

Review this webpage:

https://logi.wiki/index.php/CD3215_Bootup_Sequence
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Macbook Pro 13'' - A1989 stuck at 5v

Macbook Pro 13'' - A1989 stuck at 5v

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