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this motherboard is clean, no liquid, the customer say after change his battery the macbook won't start.
When i short pin 5 J5713 the mac don't start
nothing burn on the board. where...
i have this macbook air with problem on the display (external & internal) black screen no image but i see the backlight.
I have chime on start, fan turn, no liquid spill on the board very clean.
I check PP3_V3S0SW_LCD_UF=3,35V , PPHV_S0SW_LCDBKLT=22V.
i check resistor near lcd connector...
i check the service manual guide (i have a friend who work for apple service center). you can look the minimal configuration talk about a 5W power adapter.
it's not very important, heat a 40°c (thermalgun), i think it's the CPU. normal?
PP5V_S0SW_LCD, PP5V1_S4SW,PP1V05_S4SW, this...
this board liquid near U7000 & U7201, i change the caps damage.
I have green led
G3 rails are good, S5 rail too, but S3 rails are 0V except PP5V_S3_REG, and S0 rail at 0V
Y2810 pin1 =1,569 . pin2=1,750V
I try to short the power pad but...
I don't undetand duke sorry
i already check the PPxxx with 0V is not short. I check each signal where voltage is generate but i find why the signal is 0V.
When you say S4 rail, it's all signal with S4 in the name? or other thing?
i try with motherboard only with connector usbc and power adapter...
I check all rails except PPVBUS_E85,PP5V1_S4SW_CC1,PP5V1_S4SW_CC2 i can't measure.
all rails are good except
i have only the power adapter without battery
i try to solve my first macbook, when i plug the original power adapter 87W, i have nothing on the display.
I dissassemble the mac, the logic board is clean (no liquid). the customer say before this problem, the mac shutdown intermittent.
i measure this Voltage:
I have an issue with this board.
Q7102 & F7040 is burn, i change it now I have F7040 and remove Q7102 but i haven't this component.
Q7102 is it necessary to boot? because when i short power pad, fan don't spin or another dead component, C7771 = 1.05V
No liquid on board.
i have 2 problems on this board, i have video issue (like the picture) and the SSD is not detect by the motherboard (i don't have another macbook pro to test the ssd).
the customer say maybe the problem come after put a board supply by 12V.
i seems it's strange, if that the board will be...