Re: Macbook Air 13 A1466 820-3437-B and 00165-A
Hum... I'm really not up to date... I just realized that 00165-A that I was thinking of starting only in SMC bypass mode just doesn't start with the charger I used... I really don't know why some boot with and some doesn't (85W, don't know if it's original or not, but the other one I used with which all boards boot is definitely not an original, just a good copy)
toinounet21
Member
Last Activity: 10-24-2023, 08:50 AM
Joined: 06-25-2023
Location: Dijon
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Re: Macbook Air 13 A1466 820-3437-B and 00165-A
Just tested on the three boards, one miraculously came back to life, probably after having finished drying following ultrasonic cleaning, the other two stagnated at 27/29mALeave a comment:
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Re: Macbook Air 13 A1466 820-3437-B and 00165-A
Ok, I will try that, hum for the three first boards it's fun because the three had just one little oxydation point, after have cleaned and replaced the parts concerned, the problem stay the same on the three
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Re: Macbook Air 13 A1466 820-3437-B and 00165-A
Oh OK I see, which voltage precisely and what are the intended values, what they means?
BTW how to check current sensor?Leave a comment:
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Re: Macbook Air 13 A1466 820-3437-B and 00165-A
What do you mean? Is there a tool to measure current like on the USB-C Macbooks? I haven't done any repairs for several years and may not be up to date
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Re: Macbook Air 13 A1466 820-3437-B and 00165-A
Thanks for your answers guys, I've just checked one board for now, PP3V3_S5_AVREF was one of the first checks and is OK, I will check sensors, BTW I have at least 3 boards which doens't starts, starts in SMC bypass mode and have backlight issue, could there be any link with the SMC or just boards with this fault that were maybe put aside and dirty over time?
Muerto, I just saw your SMC reprogramming tool, I did something similar a few years ago with SMCs bought on Aliexpress and everyone here thought I was crazy xD, never...Leave a comment:
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Macbook Air 13 A1466 820-3437-B and 00165-A
Hi, I picked up a big batch of Macbook Air A1466 and just tried them, a lot boot in SMC Bypass mode, I have known this procedure for a long time but I still have doubts about the meaning. What does it mean if it boots correctly in this mode? I assume everything is OK apart from the SMC? I've checked on one every pads around it all seems to be OK, except PROCHOT but if I'm not wrong it comes from the SMC?
Thanks for your answers -
Re: Macbook Air 13 2020 A2179 820-01958 partial power
I tried with U7700 removed, I think it's even better, right? same oscillating valueLeave a comment:
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Re: Macbook Air 13 2020 A2179 820-01958 partial power
I've noticed that PM_SLP_SUS_L is fluctuating less than 2V, and RES to GND is not 100K like on the working board but only 60K. I have replaced U7700, RES to GND is OK, now fluctuating up to 3.3V but always not steady (maybe bad soldered, 3 years I have not practiced)
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Re: Macbook Air 13 2020 A2179 820-01958 partial power
not sure there is an _EN for PP3V3_S5 it seems to be generated by U7800, all others OK rails are steady, exactly same res as on the working board I have (130K)
Just tested with this board, starts without battery/keyboard, CPU hot SMC_RST_L high of courseLeave a comment:
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Macbook Air 13 2020 A2179 820-01958 partial power
Hi, glad to be back here after 3 busy years, today I'm working on this board (first T2, so forgive my stupid questions) board looks clean but maybe cleaned before
Volt/Ampmeter says 5V -> 20V and steady 0.095A
It seems power on, yesterday when I plugged charger I had the plugging sound and nothing on screen, I first thought about display problem, but I noticed that when I long press power button to force shut up, voltages that are not present when the board is turned off fall to 0 and rise up as soon as it tries to restart immediately.
I tried to... -
Re: New Members - please post your introductions here
Hi, I'm an old member, but inactive since 2019/2020, happy to be back here always competent people and interesting posts, I'm from France and have a macbook motherboard repair business
Thanks to accept me there ;-)Leave a comment:
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