PP3V3_G3H_RTC_X is 3.3V. PP1V8_SLPS2R have 1.81V. U6940 pin 10 are at 0V
Macbook Pro A1990 PP5V_G3S missing
Collapse
X
-
What is the default voltage to ground on PMU_ONOFF_L? This should be a logic '1' since there is a pull-up to PP3V3_G3H_RTC_X @ R8015. When the power button is not pressed, the default voltage should be 3v3. There should also be a button or shorting pads @ SWK000 (opposite of the PCB) for the same purpose.Comment
Related Topics
Collapse
-
mb code:820-01827-A;
sn:C02Z349ALVDR;
i9 32GB Ram 1TB
Hi, I found short on one of 6 black nand (total 1TB).
i removed all 6 nand ( voltages all ok) and now i want to program with JC P15 but for A1990 2019 there is only 512GB configuration.
I try A2141 1TB configurazion with TSB4228 but the position on pcb is different ( U9300 and U9400 is no stuff on A1990 but present on A2141 and U8800 and U8900 is no stuff on A2141 but present on A1990 )
macbook with A2141 configuration run on recovery but don't complete it.
anyone can help me?05-26-2025, 09:27 AM -
by robkaHi,
my MacBook Pro 15" 2018 Touch Bar (A1990) doesn't charge anymore. Board# 820-01041-A
I'm not experienced in diagnostics, but I want to try to solve the problem with your help, because every local shop charges around 600€ (650 usd). Which is the value of the whole Macbook.
The Macbook was charging when suddenly the "charging sound" appeared every other second for around 4-5 times.
After that the Macbook was dead. It isn't charging anymore.
The USB-C Port where the charger was plugged is burned. Also The Cable and the... -
Hey! This is a A1278 macbook 2011.
Problem: Not turning on / No green light
Im using by3200s charger.
Voltajes:
PPBUS_G3H = 12.26v
SMC_RESET_L = 3.3v
PP3V42_G3H = 3.42v
U7000 =
Pin 1 CHGR_AGATE = 0v
Pin 2 CHRG_DCIN = 19v
Pin 3 CHRG_ACIN = 4.6v
Pin 10 SMBUS_SMC_BSA_SDA = 3.3V
Pin 11 SMBUS_SMC_BSA_SCL = 3.3V
Pin 12 PP3V42_G3H = 3.42v
Pin 13 CHRG_RST_L = 3.3V
Pin 14 SMC_BC_ACOK = 0.8V
Pin 19 PP5V1_CHRG_VDD = 5.05V
Pin 20 PP5V1_CHRG_VDDP = 5.03V... -
by DATATECH85Hello,
I am currently working on a Macbook Pro A1990 (motherboard 820-01041) which is not charging.
The Macbook consumes 5V and 0.019A at USB-C. There seems to be a partial short-circuit on the PPBUS_G3H rail as I have 0V on this rail.
I've physically separated (by removing F7000 and F7001) PPBUS_G3H and the ISL9240 charging chip to see which side the short is coming from. Removing these fuses gives me 12.6V at the output of the ISL chip (PPVBAT_G3H_CHGR_REG).
However, I can't work out exactly why I don't have the PPBUS_G3H rail.
Here are the values... -
by ahoonidHey everyone,
I bought a MacBook A1990 with no screen. I bought it knowing the motherboard was defective but wasn't sure what the problem was until I received it. It actually turns on but as you see from the attachment, it has vertical stripes, on an external screen!!
The board is neat. Not opened before for sure. Just a little dust, nothing more.
Recovery using wifi can be opened, as can also be seen in the photo but it doesn't go all the way through after connecting it to a wifi. It downloads the initial Recovery files but never completes the rest of the... - Loading...
- No more items.
Comment