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Hi Guys, this A2141 820-01700 came with liquid damage on 2 spots only:
C6466/6452 - PPBUS_G3H_SPKRPAML - 12.6V - 0.39
C9580 - PPBUS_g3H_SSD0_SNS - 12.6V - 0.39
The only short I located apart from than CPU Phase lines is on
PP0V9_SLPDDR - 0.049
PP0V82_SLPDDR - 0.032
PPVDCPU_AWAKE - 0.010
There...
Passes all Apple diagnostic tests. Geniuses said its a faulty TouchBar
Tried most of these - https://repair.wiki/w/A1706_2016-2017_13”_Touchbar_MacBook_Pro
Disconnected the Touchbar as it was showing only yellowish background
Wiped the drive and reinstalled High Sierra - It installed properly...
This board is a return case with liquid damage from 2 years ago. Not sure if related.
Stoped turning on, Seems like a screw got loose and got stuck between the GND of C7323 and the fan connector, Probably not related as well. Cant measure any direct shorts anywhere.
All voltages until...
A1706 820-00239 which had extensive liquid damage.
Located and removed the short on PPBUS_G3H. Now turns on, charging and works fine. Passes Apple Diagnostic. The only issue seems to be not USB and HDMI output via either of USBCs. No light on a USB drive.
Tried SMC reset. Another strange thing...
Go this A2442 820-02098 with liquid damage.
Visible damage with a burn mark on CD3217 closer to the HDMI. Shorting LDO's. Shorts gone with removed CD3217
Visible blown TPS62180 ELC180. When removed short persists between two phases
Initially would stay on 5V 0.25A via the Magsafe3
With...
Tried DFU mode but did not get picked up.
Under IR U7800 seems to warm up to 34*C
No visible shorts on coils, low impedance on
P0V9SLPDDR_SW0 - 53Ohm
P0V9SLPDDR_SW1 - 53Ohm
While
P1V1SLPS2R_SW0 - 8.9kOhm
P1V1SLPS2R_SW1 - 11kOhm
Lifted up L7186/Lt187 low impedance seems to be on the...
Hi Guys, this board had liquid damage after cleaning and removal of a bunch of burned PP3V8_AON_MPMU_ISNS_VIN filter caps, it turned on.
But now it's stuck at 5V 0.01A and I measure short (0.55Ohm) between C81D7 and C81H1. Seems to be in/out of the U8100.
Anything else I can do? I have a...
Hi Guys,
An interesting case here. A1297 takes about 9 hours to charge the new battery completely.
The previous battery which was replaced (less than 6 months ago) also had a similar issue where it took longer to charge. Then suddenly stop charging and drained to 0%.
With the replaced battery...
Slight liquid damage, after clean all working fine except the camera.
Diagnostic says there may be an issue with the camera. Not sure if that means detected by problematic signals or not detected at all.
Not detected under System Report
PP5V_S0_ALSCAM - 5.1V
PP5V_S0_ALSCAM/PP5V_S0_ALSCAM_F -...
SMC bypass - no response
All voltages steady
PPBUS_G3H - 13V
PP5V_S5 - 0V
PP3V3_S5 - 0V
PP3V3_G3H - 3.41V
PM_BATLOW_L - 0V
Slight corrosion around:
U7210/20, R3702, C3700
Quite a corrosion between U2890 and U3770, also U8440
All coils diode modes seem ok, comparing to a working board. Apart...
The current change of board view format of 820-02020 to be compatible only with the paid version of FlexBV, seems to require techs to purchase a license.
While looking for alternatives I have noticed XinZhiZao being an interesting subscription-based alternative for gathering not only...
Just got this in today with liquid damage. When connected to the charger with a battery it gets 5V 0.33A and the Apple chips get very hot. Noticed it has a short on PPBUS_AON with removed F5200.
Seems like will have to buy FlexBV to be able to go through the board view. Where shall I start? Is...
Hi, I am dealing with this 820-01041, which gets 5V 0.1A on one set of USB-C chips UB300/400 (these had liquid residue all around them) and 5V 0.44A U3100/3200 on the other set.
UB300 - PP3V3_UPC_TA_LDO - short - 0.0125Vdc
UB400 - PP3V3_UPC_TB_LDO - short - 0.0130Vdc
Shall I measure something...
I got this A2159 820-01598, which have looping 5V 0.3A on the charger.
U3200 shows a pulsing heat signature on both charging ports. While PP3V3_UPC_XB_LDO is shorting. PP3V3_UPC_XA_LDO shows 0.5Vdc.
I don't see any liquid damage on the board itself, only the bottom of the battery sensors...
I got this 820-01521, which had liquid damage—no major corrosion on the board, some around CC788/9 and CC8A1. I can see slight heat dissipation from the T2 security chip.
PPVIN_G3H_P5VG3S - 12.63V
PPBUS_G3H - 12.62V
PP3V3_G3H - 3.25V
PP5V_G3S - 0V - 0.42Vdc
CHGR_PHASE1 - 12.40V
Where shall I...
A beer damage board turns on with no backlight. Tried SMC reset, capslock is active and there is USB activity
The backlight blinks for a second once when turns on.
D7701 - 8.6v both sides
XW7720 - 8.6v and clean
BKL_EN - 2.83v
BKL_PWM - 0v
All Return resistors 0.6Vdc
Removed R7704 and tied...
Hi Guys, came across to 820-3332 which turns on and chimes, but no screen neither internal nor external. No Capslock response either.
No liquid damage, but very dusty and must have been overheating for a while.
Not sure if its GPU issue or something else I should look for. CPU/GPU gets very...
Hi Guys,
I have this board which had liquid damage and shorted Q7010.
Now is on and loading os, but the fan is not spinning and cannot detect any RPM, when measured:
PP3V3_S0_FAN - 3.3V
PP5V_S0_FAN - 3.3V
SMC_FAN_0_TACH - 3.3V
SMC_FAN_0_CTL - 0V - comes straight from underneath SMC. No...
Got this board with small amount of liquid damage around U7650, a quite similar case to @CRC2018 - 820-00840-a Wont start missing PP5V_S5
Another area which had some liquid damage was C3403, which seems a bit corroded but still makes good contact.
PP3V3_G3H - 3.3V
PP5V_S5 - 0V - 0.43Vdc...