i have a m1 macbook air(a2337) board 820-02016 that came for water damage and will not turn on. Upon opening i saw that the audio board is severly corroded. I disconected it and still will not turn on. It is drawing only 5v and .1 a. from taking measurements i see that PPCHGR_VDDA has 0v and CHGR_GATE_Q1, CHGR_GATE_Q2 also have 0v and 0ohm to ground.
PPVBAT_AON_CHGR_REG as well as PPBUS_AON is cycling between 10 and 12v
PPDCIN_AON_CHGR_R has 5v
P3V8AON_PWR_EN has 5v
PP3V8_AON_VDDMAIN has 3.8
razer94
New Member
Last Activity: 02-29-2024, 11:08 AM
Joined: 11-21-2022
Location: mississauga ontario
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Re: Apple 16" macbook pro 820-01700 stuck at 5v
So i measured the resistance from c9091 pin 1 and c9081 pin 1 and there is 6ohms.i I also see 27ohm from c9091 to ground. Does this mean the NAND is gone? -
Re: Apple 16" macbook pro 820-01700 stuck at 5v
so with fuses removed is there no point to measure the LDO at the ACE controllers?
Low impedence in the G3H line is still another problem tooLeave a comment:
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Re: Apple 16" macbook pro 820-01700 stuck at 5v
Should i still check this with the fuses still removed.
And yes the power supply is 20v and if it need 20v it will supply...Leave a comment:
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Re: Apple 16" macbook pro 820-01700 stuck at 5v
I'm using a bench power supply with by-3200 power cable.
Input voltage is still 5vLeave a comment:
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Re: Apple 16" macbook pro 820-01700 stuck at 5v
So with both fuses removed voltage at pin #1 is 12.31v. So I am assuming that that side is okay?...Leave a comment:
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Apple 16" macbook pro 820-01700 stuck at 5v
Hi I have a 820-01700 board that will not boot. Can yall guide me on trouble shooting. It has had previous water damage but was cleaned and working until recently
It is taking 5v through usb-c and taking 0.05a
PPBUS_G3H - .297v
F7000 resistance to ground is 33ohm
PPDCIN_G3_CHGR - is 5.07V
I'm not sure how to proceed at this point any help would be appreciated -
Re: New Members - please post your introductions here
Hi, my name is Ryan, im from Toronto Canada. I run a small electronics repair shop dealing primarily with cell phone and laptop repairs.
I was a Automoive technician for 8 years but moved on to electronics. Right now i am trying to learn microsoldering and diagnosics.
Im looking forward to the information and the knowledge i can learn from all of you and to pass on stuff i can hopefully learn as well.
Thanks!Leave a comment:
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