• Macbook Air A1466 (Main 820-00165-A) No power, no green light

Danes je 3 Februar 2026, 22:45

Macbook Air A1466 (Main 820-00165-A) No power, no green light

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#1 Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 21 November 2022, 11:09
Hello, this macbook does not turn on completely, no led in the magsafe.
No traces of oxidation.
I did some voltage checks:
PPBUS_G3H 8,1V
PPBUS_S5_HS_COMPUTING_ISNS 8,1V
PPBUS_S5_HS_OTHER_ISNS 8,1V
PPDCIN_G3H 15V
PP3V42_G3H 3,42V
PPVRTC_G3H 3,38V
PP5V_S5 0V
PP5V_S4RS3 0V
PP5V_S0 0V
PP3V3_S5 0V
PP3V3_S4 0V
PP3V3_SUS 0V
PP3V3_S3 0V
PP3V3_S0 0,11V
PP3V3_S0 3,39V
SMC_RESET_L 3,38V

Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a Google Adsense [BOT] • 21 November 2022, 11:09

#2 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a Vogelek23 • 21 November 2022, 14:29
robgerr napisal/-a:PPBUS_G3H 8,1V
Too low - should be 8.6V. Check the stiff signal flex connecting an I/O board to the logic board.

robgerr napisal/-a:PP3V3_S0 0,11V
PP3V3_S0 3,39V
Which value is correct???

robgerr napisal/-a:no led in the magsafe
What are the voltages to ground on these two ICs (all pins)? Charger must be connected during measurements. I have marked the proper pin count.
Slika

#3 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 22 November 2022, 11:30
Hi Vogelek
PP3V3_S0 0,11V
Slika

#4 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a Vogelek23 • 22 November 2022, 13:11
I said ALL PINS, please measure all pins voltages to ground. I have marked pins 1 and 5 of both ICs just to simplify the pin count for you (and I have made a mistake here so please find revised markings below).
Slika

#5 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 23 November 2022, 18:06
Sorry Vogelek, I misread your previous post. I'll send you the photo with the measurements. Unfortunately I don't have the boardview of this power supply card but only the motherboard.
Slika

#6 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 26 November 2022, 11:47
Are these voltage values ​​that I found right or not?

#7 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a matic • 26 November 2022, 12:25
robgerr napisal/-a:Are these voltage values ​​that I found right or not?
Yes, these voltages are fine.

The issue is most likely related to to the communication between the SMC and charger chip.
Measure the voltages to ground on pins 2, 10, 11, 13, 19, 20 of charger chip U7100.

#8 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 26 November 2022, 12:43
Hi Matic, thank's for your reply
U7100:
pin 2 14,72V
pin 10 3,42V
pin 11 3,42v
pin 13 3,40v
pin 19 5v
pin 20 5v

#9 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a matic • 26 November 2022, 13:08
Try to reflow the SMC chip.

#10 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 26 November 2022, 14:02
Try to reflow the SMC chip.

I reflowed smc bga but same problem

#11 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light 

Napisal/-a matic • 26 November 2022, 16:35
robgerr napisal/-a:I reflowed smc bga but same problem
Did you heat it to the ball melting point temperature?
If so, replace the SMC chip.
Note that the replacement SMC chip should be "pulled" from the same motherboard.

#12 Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a robgerr • 11 Februar 2023, 17:17
In the end I had to change the motherboard because the customer was in a hurry. Thank you all for the help

Re: Macbook Air A1466 (Main 820-00165-A) No power, no green light

Napisal/-a Google Adsense [BOT] • 11 Februar 2023, 17:17
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