The MacBook does not boot. It is restored via DFU without errors. The MacBook charges and consumes 20V/2A. There is no sound when connecting the charger. The caps lock does not light up, but the touchpad clicks. The fans do not rotate. No signs of life. Please advise.
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Hi Everyone
I have a Macbook pro A2251 which fails to boot.
When i try to start it the fan momentarily spins full speed, then shuts off and it doesn't start.
This then repeats every few minutes. as if the board is stuck in a reboot loop
When i inspected the PCB i couldn't find any indication of liquid damage
I tried a few SMC reset sequence i found online but none helped (perhaps i did them wrong)
i am capable of opening the case and measuring voltage at test points. i also got the brd and layout files but i have no idea how to debug this... -
The macbook has some water damage (all cleaned) near the usb-c ports on the left side. The MacBook does not boot and is not detected in DFU! The current consumption on all ports is the same 20V and 0.079A.
PPBUS_G3H=12.3V
PPBUS_HS_CPU=12.3V
PPVIN_S0_PRIM1V8=12.3V
PPVIN_G3H_P5VG3S=12.3V
PPDCIN_G3H=19.99V
PP5V_G3S=0V
PP5V_S5_LDO=0V
PP3V3_G3H_RTC=3.38V
PP3V3_G3H_SSD0=3.38V
PP3V3_G3H_RTC_MESA=3.38V
PP3V3_G3H=3.31V
PP3V3_G3H_PMU_VDDMAIN=3.31V
PP3V3_G3S=0V
PP3V3_S0_TBT_XT_ISNS_R=3.3V
PPVCCIN_S0_CPU=0V
PP1V8_G3S=0V... -
Hey everyone,
Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise
I've seen what this community can do, so I'm pretty sure you guys can help me out.
Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.
Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only... -
I have read many forums that state the Macbook Pro 2015 needs / does not need a battery to boot. I'm not convinced as yet which is correct.
The Macbook Pro mid 2015 I have has no battery and do not really want to buy one just to test.
This model has the newer trackpad which is not clickable when turned off.
At the moment, without battery it does turn on with no display (with backlight), no chime and then turns off after 13 seconds. I see this from the power draw on my DTPS.
If I hold the power button whilst connecting the magsafe 2 charger it turns on, again no image but... -
Hello everyone, I have a MacBook Pro 13” 2020 (Four ports) (Model A2251 with the 820-01949-A logicboard). It had some minor liquid damage but I carefully cleaned the logic board with alcohol and let it dry as needed. Now I encounter following situation: The MacBook does start but the Battery is not charging when a cable is plugged in any of the ports (I use the powerbrick and cable that came with the device). It had some charge left, so I could safe some data, but I was limited my the 13% and the speed of airdrop. The liquid-damage is almost only limited to the side of the logic board where...