Hi, my ps4 slim turns off in 1 sec. Anything to check? Version SAE-003.
Thanks.
Mrsina77
Member
Last Activity: 01-05-2023, 02:32 PM
Joined: 02-11-2019
Location: Dycky Most
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Re: MBA 820-01521 - keeps restarting
Finally i repaired the flex and do not inserted the trackpad just to work with keyboard. I have entered PADLOCK, DFU and RECOVERY and tried to do something from internet (restore, update etc) but all I can get are some errorr. Even when it looks like it can be updated the error -1 or 75 or 3004 shows. Any idea?
Maybe update my MBA M1 which I use for restoring the MBA 2018?... -
Re: MBA 820-01521 - keeps restarting
This side was connected to the trackpad that was too water damaged. I will fix it in few minutes and try....Leave a comment:
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Re: MBA 820-01521 - keeps restarting
Ok, three way was damaged, I will repair them now and try to connect it, maybe that was for now the problem with keyboard. Just give me a sec
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Re: MBA 820-01521 - keeps restarting
As I said, I am not able to get into DFU mode because when I plug keyboard flex, macbook restarts faster. On the picture you can see how the flex is damaged. I will try to look under the black tape if its not broken....Leave a comment:
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Re: MBA 820-01521 - keeps restarting
I was not able to get into the DFU mode because when the trackpad/keyboard cable it pluged in the MBA restarts faster so I am not able to get into the DFU. Am I able to get into DFU with external keyboard (not from apple)Leave a comment:
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Re: MBA 820-01521 - keeps restarting
Its 0.257 for both.Leave a comment:
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Re: MBA 820-01521 - keeps restarting
1. Pin is 6,25Mohm
2. Pin is 6,50MohmLeave a comment:
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Re: MBA 820-01521 - keeps restarting
There is the photo. It is only when battery is pluged in. This place was water damaged. It does not looks so nice but all caps around this is good.
With battery it drains up to 1.5A.
btw: PPBUS_G3H drops same like PP5V_G3S for few seconds....Leave a comment:
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Re: MBA 820-01521 - keeps restarting
It 12.67 without battery.
11.77 with battery.
I have tried to use thermal cam with battery connected and there is one hot area at its L7030. Its about 53C immediately.Leave a comment:
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Re: MBA 820-01521 - keeps restarting
Voltage is 1.8V on both resistors but voltage drops to 0V like PP5V_G3S.
I have tried to turn on/off with SWE010. Current to the MBA was higher up to 0.45A. Stable current from adapter is about 0.2A. Firstly the second spin was longer about 2sec and fan went to very high speed and then it turned off.Leave a comment:
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Re: MBA 820-01521 - keeps restarting
I am testing it only with adapter.
I remember that when the trackpad was pluged in (it was too water damaged I just remember) MBA did not want to start up and there was too power cycling (restarting MBA). After unpluging the MBA loaded fine. After pluging in again power cycling. Maybe some short on trackpad railways?Leave a comment:
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Re: MBA 820-01521 - keeps restarting
But it was working fines for about few time after clean. AUX board was water damaged too and battery board too. Everyting was cleaned but I disconnected it. All what was connected was display and battery but somehow it started cycling. You think that U7800 can be somehow damaged?Leave a comment:
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Re: MBA 820-01521 - keeps restarting
It drops at the same time.
When I plug the power cable after 10s fan starts spin for 3s. After that it stops and after next 10s it starts spin again for 8s and after that both voltages drops for 5s. After that voltages are present again.Leave a comment:
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Re: MBA 820-01521 - keeps restarting
P5VG3S_EN_DLY is stable 3,31V
PP5V_G3S i hard to measure. Lot of changes from kohm to Mohm. But after two minutes on one pin it shows about 40kohm....Leave a comment:
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MBA 820-01521 - keeps restarting
Hi,
my macbook air 2018 (A1932) keeps restarting. I have found that lot of caps are shorted around U7800.
(C7814, C7835, C7833, C7815, C7828, C7813, C7827, C7812, C7811, C7823, C7826, C7821, C78C0, C7822, C7824, C7825, C7837, C7834, C7836, C7838) - PPVDDCPU_AWAKE and PP0V82_SLPDDR
Are these caps low resistance or U7800 should be inner shorted? MBA was water damaged but after the clean MBA worked about 10 times but after that keeps restarting after few seconds.
Water damage was aroung Q7680, Q7660, Q7030 and Q7040. I will try next week to replace... -
Re: MBA 820-01521-A dropping PP5V_G3S (macbook restarts during boot)
Resistance on the line is very low (under the 1ohm).
Resitance to the ground falls down from XMohm to XX Kohm....Leave a comment:
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Re: MBA 820-01521-A dropping PP5V_G3S (macbook restarts during boot)
Yes I do have backlight. Earlier I have seen Apple logo but now without apple logo. I was trying to do reset SMC or NVRAM. First try after this reset I am able to see apple logo. After 10sec macbook restarts and no apple logo, only backlight. All I have found was that PP5V_G3S is droping voltage for a while that cause the restart of MB.
Trackpad is off....Leave a comment:
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Re: MBA 820-01521-A dropping PP5V_G3S (macbook restarts during boot)
Thanks for reply but this is not close to my problem.
When I have cleaned the board than my macbook turned on for 5 times (I was testing it). Next day macbook only restarts. So it means the macbook was somehow working but something happened. When I plug in the trackpad MB keeps restarting faster....Leave a comment:
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MBA 820-01521-A dropping PP5V_G3S (macbook restarts during boot)
Hi,
I have liquid damaged macbook air 2018. Macbooks restarts after 10s when its trying to boot.
Q7660 was water damaged and I have cleaned everything. It is connected to the U7650 that makes the PP5V_G3S. When its trying to turn on than everything voltage seems fine and than it drops and after 10s its trying to boot again and again.
Anyone to help me to solve it?
Thanks for reply.
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