Re: Macbook Air 820-3437B missing PP3V3_S5
It was the ribbon cable indeed. Had a lot of fun diagnosing and repairing this macbook...
mrdefaultuser
Member
Last Activity: 06-06-2022, 04:45 AM
Joined: 05-30-2022
Location: Delft
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Re: Macbook Air 820-3437B missing PP3V3_S5
So changed the resistor, macbook boots now! Though not completely there yet:[LIST][*]Power button and keys are not working.[*]Trackpad not working[*]Fan at 100%[/LIST]
Something to work on this weekend, anyway progress has been made- Re: Macbook Air 820-3437B missing PP3V3_S5
So changed the resistor, macbook boots now! Though not completely there yet:[LIST] - Power button and keys are not working.
- Trackpad not working
- Fan at 100%[/LIST]
Something to work on this weekend, anyway progress has
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- Re: Macbook Air 820-3437B missing PP3V3_S5
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Re: Macbook Air 820-3437B missing PP3V3_S5
Removed the resistor and checked resistance afterwards, but no shorts on both sides now. I don't get it...
Fan spins 3 times with the resistor removed so thats looking promising, will use some equipment at work tomorrow to look at it a little better....Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
Ohno! 1 Ohm!...Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
P5VS4RS3_EN 0V
PPBUS_S5_HS_OTHER_ISNS 8.57V
L7520 1/2 0V
Thanks for thinking along!...Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
2.5kOhms, if I remember correctly. At least high
Paths are ok, almost zero resistance on the paths.
Already ordered a U7501 some days ago. Will take some time for it to arrive. Thanks for the help so far!...Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
Did not notice any change by doing that. Doing that is also more useful with newer macbooks if i recall correctly right?...Leave a comment:
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Re: Macbook Air 820-3437B missing PP3V3_S5
ppbus_s5_hs_computing_isns 8.57v
ppbus_s5_hs_other_isns 8.57v
pdcin_g3h_isol 17.09v
ppvrtc_g3h 3.42v...Leave a comment:
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Macbook Air 820-3437B missing PP3V3_S5
Hi all, I'm new here (thanks for having me). I've repaired some macbooks in the past, but never had to dig really deep, until now...
Got my hands on a Macbook Air that does not boot. Charger light goes from green to orange so there was some life in this thing.
Did some digging to find that I do not have a PP3V3_S5, also not pulsing in anyway. SMC_PM_G2_EN is also missing, no pulse.
Some voltages:
PPBUS_G3H 8.56V
PP3V42_G3H 3.42V
PPDCIN_G3H 16.5V
PP5V_S5 5V
PP3V3S5_EN_R 3.41V
PP3V3_S5_AVREF_SMC 3.24V
SMC_RESET_L 3.38V... -
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