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have a new Apple Macbook Pro A1990 which does not power up, no fans, no chime and black screen. tested USB C port and the:
1. when the board on Apple MacBook Pro connected to the battery --> 19.7v 2.45amps. Amps
2. when board directly connect to the charging cable --> 5.10v 0.50amps...
u3100 not giving any power i test the traces from j3300 on line
PP20V_USBC_XA_VBUS good
usbc_xa_cc1 good
usbc_xa_cc2 has a short to ground i think it c3114 or dz3301 i removed both and still have short does that mean u3100 is bad
We've got a A1706 with no touchbar that is failing to'Critical update.
Also tested the board in a different housing and still the same error.
Not sure where to check next.
Just to add that the Macbook boots in safe mode
on port for U3200 a/c adapter works one direction when flip over it does not i tried different cables with usb volt meter it goes to 5v then 19.5v then shuts down
with out battery i get 19.7v and it goes up to 1.20a i get fan spin for 7 seconds then 19.9v oA i press power button and it does all over again
with battery 19.7 2.10A and it turns on everything works battery charging i can unplug charger everything ok if i close lid and open screen will not...
I GET 5.10V WITH 0.27A FOR 7 SECONDS THEN IT CYCLES AGAIN
PPBUS_G3H = 12.23V
PP3v3_G3H = 3.30V
PP1V8_SLPS2R = 1.8V
PP1V8_AWAKE = 1.8V
PP1V1_SLPS2R = 1.1V
PP0V8_SLPS2R = 0.79V
PP3V3_AWAKE = 3.29V
PP1V2_AWAKE = 1.20V
Could u3100 be bad
I CHANGE SCREEN AND STILL NO CAM I
Test THE Ambient Light Sensor AT L4004 AND its good i get 5v
at J8500 pin 38 12C_cam_scl i get 1.8v
40 12C_cam_sda i get 1.8v
Trying to fix this MacBook Pro (16-inch, 2019), but no success.
Under thermal camera i found short on u9080 AND U8600
PP2V5_NAND_SSD1
PP2V5_SSD1_AGND
PP2V5_SW1_TPS62180_SSD1
PP2V5_SW2_TPS62180_SSD1
SO U8600 IS SHORT IS IT FIXABLE
on the 3 usb c i get 5.1v .33A NO 20V
PP3V3_G3H 2.5V
U3100
PP3V3_UPC_XA_LDO 1.8V
U3200
PP3V3_UPC_XB_LDO 3.3V WHEN I USE IT WITH POWER CORD WHEN IDO'T 2.5V THE SAME ON UB400 AND UB300
I HAVE A 820-00928 I GETFAN SPIN WITH 19.5V 0.1OA WITH NO BATTERY
I GET 5.21V FROM USB I EVEN TRYED REPLACING BIOES NOTHING
L7211/21/31/30 /50/350 these coils have .33mV
L7410/ 20 .33mV
LA640.28mV
i had a short on ppbus_g3h i found it at U9080 i removed and short was gone i replace U9080 i get 19.5v 0.16a i notices u8800 getting hot no boot i tryed DFU but get era
The operation couldn’t be completed. (AMRestoreErrorDomain error 6 - Failed to handle message type StatusMsg (Operation...
the board has no water damage it came in with bad screen and no sound i change screen but no sound it says no audio found
u6200
pp1v8_so 1.8v
HDA_SDOUT 0V
HDA_RST_L 0V
HDA_SYNC 0V
820-00165 short on ppbus_g3h at F7140 was blown i get 8.4v on pin 1 ppvbat_g3h_chgr_reg and a short on pin 2 ppbus_g3h i supplied some voltage to see if any get hot but nothing