obelix24
Badcaps Veteran
Last Activity: 05-30-2025, 06:13 AM
Joined: 06-18-2023
Location: Kosice
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Any idea how can i test this ? -
Is it not possible that the macbook is in recovery screen and as it's touch bar i don't know how to switch screen to external (shortcut CMD + F1 is not possible here as touch bar haven't lid up during this first screen)
i tried to connect windows USB keyboard but i don't know the combination to switch screen.
does anyone know how to switch screen on touch bar macbook without internal screen.Leave a comment:
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external screen was working as there was burned pin under CPU.
Now there is no output to external screen (i tried restore, revive in DFU mode) also Restore in Recovery mode was finished successfully, but still no output to external screen.
Also Capslock is not green if i press it, nothing on touch bar, only trackpad response.
In apple controller if i try right click on pad lock / quick look it shows booted but storrage it still Loading. (but i guess this shouldn't be problem as if there will be any problem with SSD chips restore, revive will not finish)
[B]IPD_LID_OPEN[/B]...Last edited by obelix24; 05-12-2025, 05:58 AM.Leave a comment:
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OK i found same motherboard a1989 and i have transfered all 4 ssd chips (to exactly same location)
Now when i connect a1989 to other macbook i'm able to restore it via apple configurator (it will finish with padlock in apple configurator)
but there is nothing on external screen (trackad is responding so T2 is alive) also nothing obvious is getting warm.
When i try to Revive it's also successfully done (it finish with padlock on apple configurator) but again there is nothing on external screen.
This macbook was working fine on external screen (as internal...Leave a comment:
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A1989 - replace SSD
I have one A1989 that have not internal LCD (there was water damage on LCD connector) but macbook itself was working fine.
After some time it stoped working and starts in Recovery mode. When i try to restore in DFU it always fails with error : AMRestoreErrorDomain error 75 - Failed to handle message type StatusMsg (Missing data volume))
Is it possible to just swap SSD from some other macbook ? (or it have some dependecies ? A1989 only, some special possition from donor to correct possition on my macbook ? or i can take any SSD chips from any other macbook (with T2) and put... -
ok so to me it looks like problem is with U5000 (but as i've tried to replace it and the macbook want start it looks like this U5000 is not replaceable ?)...Leave a comment:
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After some digging i found out that left fan is faulty and have faulty ic on fan cable.
i'm still trying to find why there is no light on charger....Leave a comment:
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I found that IC for temperature should be probably U5823
is it correct ? Is it most probably the cause of full fan ?Last edited by obelix24; 05-08-2025, 07:08 AM.Leave a comment:
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is U5000 replecable on A1398 ? i tried from differrent 15" and macbook is not turning on and fans are going to max speed but not immediately but it take some time....Leave a comment:
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they all looks ok.
I noticed one this when i put everything back to case macbook doesn't turn on as before ....
I've returned original [B]U5000 [/B](the other one i've used from donor [B]a1466 [/B]- same numbers) during replacing i probably damaged [B]X29 [/B]as now macbook turns on but fans are on full speed.
Is this connected to [B]Q6060 [/B]?
But there is still no light on charger ... I was thinking if it's not caused but not original battery but i don't think as the light is not there even if battery is not connected and it should be there.theyLeave a comment:
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which compoment is the X29 sensor ?
is it Q6060 ?...Leave a comment:
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i tried to replace U7001 but still the same .... the SYS_ONEWIRE is created by U5000 no ?...Leave a comment:
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pin 4 on U7001 -
SMC_BC_ACOK_VCC - 3.418V
i tried to replace U5000 and U7000 but now difference....Leave a comment:
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according to this SYS_ONEWIRE should be 3.4V but i have only 2.8V
PPBUS_G3H - 12.58V
I'll try to replace U7000Leave a comment:
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i tried cleaning, different connector, different charger... still no lightLeave a comment:
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I've checked U7000 and U7001 (diode mode readings are ok)
When power is connected U7000 and U7001:
ADAPTER_SENSE - 2.8V
SYS_ONEWIRE - 2.8V
SMC_BC_ACOK_VCC - 3.4V
SMC_BC_ACOK - 3.28V
PP3V42_G3H - 3.42V
Diode mode readings U7000 and U7001:
ADAPTER_SENSE - 0.621
SYS_ONEWIRE - 0.677
SMC_BC_ACOK_VCC - 0.586
SMC_BC_ACOK - 0.552
PP3V42_G3H - 0.324Leave a comment:
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A1398 - 820-3663-A - not charging
I got macbook pro A1398 15" from my friend. He told me that he changed battery and macbook stopped charging.
Boardnumber : [B]820-3662-A[/B]
I've checked and when i connect charger it's recognized by MacOS but there is no light on charger and it's not charging battery (i've tried multiple chargers still the same behaviour), i've also tried 3 different magsafe ports.
I've check [B]U7100[/B] and replaced it multiple times (from other donor boards that i have) (i've tried probably 7 different [B]U7100[/B]) - i've also checked current resistors around this... -
Yes it was working and in the time waiting for new screen i let battery connected as i tested this macbook without screen with external display. Then put to shelf.
i noticed one thing when i try different amp meter i can see
one port is 5v 0a 9999.9ohm
but on the other port there is 5v 0.02-0.03a and ohms are sometimes 185ohms and sometimes it jumps to 9999.9ohm (on ampmeter) see attached photo
does this mean anything ?...Leave a comment:
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Will injecting voltage show something ?...Leave a comment:
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A1707 - No internal display
I got two Macbook's Pro 15" A1707 both fully working except no image on internal LCD.
I've checked and it looks like it's problem with U9850 (on both pin 1 on screen connector is 0.007 or 0.050 in diode mode)
My question is if this IC can be ordered from Aliexpress (will it work) ?? or it needs to be taken directly from donor (a1707, a1990, a2141) ?
Is this IC interchangeable (on my board i have 6142E and i found that there can be also HD3SS212) are this chips same ? ? Is it possible to find this IC on some other Macbook 13" (air, pro) ?? i have...
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