the power button does not work on/off! the finger scanner works! tell me what to check?
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Power button is often the edge contact of the FPC cable so do check for this.
Use tweezers on the PCB pcb pads for the power button bypass to confirm the logic board can turn ON/OFF -
I beg your pardon, but which contacts need to be short-circuited?Comment
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the problem is definitely on the board side, since I connected other buttons of this model and they also do not work!Comment
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My bad. This model has the kooky touch button which is keyed to the logic board. If testing with other touch buttons then the fingerprint scanner will be lost. The on/off button action should still work.
Review the logic board side connector for this button assembly. Remove all power and test each logic board side connector pin in diode mode.Comment
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J4900
1: PP1V8_MESA_CONN=0.493
2:MESA_SPI_MISO_CONN=0.457
3:GND
4:MESA_SNSR_INT_CONN=0.737
5:MESA_SPI_MOSI_CONN=0.457
6:MESA_BOOST_EN_CONN=0.740
7:MENU_KEY_L=0
8:MESA_I2C_SDA=0.448
9:MESA_SPI_CLK_CONN=0.483
10:MESA_I2C_SCL=0.449
11:PP16V0_MESA_CONN=0.624
12:GND
13-14:PP3V0_MESA_CONN=0.522
15-16:GNDLast edited by PITERPENY; 11-11-2024, 06:12 PM.Comment
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as I understand it, when you press the power button in U3900, a MESA_PWR_EN signal is generated, which activates the PP1V8_MESA signal on U4920, PP1V8_MESA activates the PP3V0_MESA signal on U4910, PP3V0_MESA activates PP16V0_MESA on U4900, which starts the MacBook! Or am I completely confused and all this is wrong?Comment
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Hola chicos, espero estén bien, he estado buscando información para aprender a hacer eliminación de password EFI en macbooks.
Actualmente tengo un problema con una macbook pro A1706 820-00923 SN:C02VD3GJHV2Q
Si podrian ayudarme les agradeceria mucho o algun link para aprender a hacerlo y no volver a molestarles.
gracias de antemano y que tengan una linda tarde, disculpen si estoy rompiendo alguna norma.
Hi guys, I hope you are doing well, I have been looking for information to learn how to remove the EFI password on macbooks.
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hello,
so i have an macbook pro A1706, motherboard 820-00923, everything works and it does charge without a problem but when i plug anything to the usb c it doesnt do anything, it doesnt give 5V on usb drive or any other peripheral,
i have opened the macbook and i can see some little corrosion on C7601 and C6950,, i have cleaned it and i measure 15v on C6950 PPVBAT_G3H_CONN -
Hi guys i am new to macbook repairs (i mostly do microsoldering on iphones and android devices. I need your assistance with macbook a1706 (touchbar edition) that came in without touchpad and keyboard functionality. External keyboard and mouse does work but the keyboard and touchpad on the macbook does not work. I changed the touchpad flex, also replaced the touchpad but the issue persisted. I then measured voltage on the board and found that PIN 44-50 of the touchpad connector (J4501) got 11.2V instead of 12.6V. Those pins required 12.6v and they get their 12.6v from PPVIN_S4-TPAD_FUSE . I measure... -
I just got in my hands one Macbook pro A1706. It was originally not turning on (only 5V 0,2a on all ports (and 3 ports were restarting ampmeter when connected)
I've replaced one CD3215C00 IC and now macbook is fully working (20V and charging fine)
There is only 1 issue that one USB-C port is taking 20V but 0A (after replacing CD3215 it was fully working and i was charging macbook on this port) but then it just turns off (ampmeter) and started with only 20V 0A.
There were some broken pads under CD3215 but i've recreated them.
What should be...05-22-2024, 08:04 AM -
Hello,
I have a A1706 with 820-00923-A board. The laptop came in with non-working keyboard. I bought a new top-cover with keyboard and transfered everything to the new topcover.
Since then the macbook will not charge or power-up. Before replacing top cover, I started the macbook to test, and it worked fine apart from keyboard. Then shut it down and did replacement.
This is what I measure so far:
Resistance from F7000 to ground is 123 Ohm on pin 1 and 2
PPBUS_G3H = 0,79v
PPBUS_HS_CPU = 0,79v
PPBUS_HS_OTH5V = 0,79v
PPBUS_HS_OTH3V3...
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