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Board had a little bit of corrosion around C2952 and PP3V3_S4 was shorted (C2952 and U8000) both replaced but I am missing PM_SLP_S4_L and S4_PWR_EN is only 0.310V
PM_SLP_S4_L Diode 0.474
SMC_S5_PWRGD_VIN Present
PPVRTC_G3H Present
U1950 Pin 8 has 3.4V
Clean board, came with shorted U7710 and U8500 now I get 20V and 0.200A after a few seconds, I do get USB 5V but no activity.
Restoring T2 takes a long time and eventually I get lock icon.
Trackpad clicks but there is not light on caps lock.
Battery was discharged and overnight it got charged...
Clean board, no history.
PPBUS 12.3V
PP3V3_G3H_RTC_X 3.3V
PP3V3_UPC_XB_LDO 3.3V
PP3V3_UPC_XB_LDO 1.5V
Already replaced all CD3217 and also U2890/UB090 from same board model donor.
Clean board, already replaced Q7180 (2 times), U7000, D7005, Q7010, D7012, C7125
R7005, R7006, R7152, R7151, SMBUS_SDL and SCL are all fine.
Testing with original 45W and fake 85W same thing.
Clean board, boots with charged battery and with battery installed I get 20V but no charge without battery I only get 5V and about 0.285A taken.
No shorts around any of the CD3217
All CD3217 have the same behavior
Already installed know good U2890, UB090, UB700, U3500 and all CD3217 as well...
Board had some corrosion around R5117 near the SMC, fixed that but the original problem of the computer restarting still there, I have boiled it down to the fan not working.
Already replaced SMC, clean BIOS, Q6060
R6060/61/65 all ok
SMC bypass also no fan spin
Shorting SMC_FAN_0_CTL to...
Board had corrosion on U7820 all else looked fine, after replacing and repairing U7820 I am now stuck at all_sys_pwrgd 0V.
PPVRTC_G3H 3.2v
PP3v42_g3h 3.42v
Pp5v_s5 5v
Pp3v3_s5 3.3v
all_sys_pwrgd 0v
Pp5v_s4rs3 0v
PM_BATLOW_L 3.3v
PM_DSW_PWRGD 3.3V
SMC_ADAPTER_EN 3.3v
PCH_DSWVRMEN 3.3v...
Clean board, had 2 caps on PP5V_S4 getting hot but not full short, after removing them and installing new U7560 I got 20V on charger but CPU core voltage does NOT go from 1V to 0.6 Tried good known bios with Medusa 3 also but same thing.
pp3v3_g3h 3.4v
ppbus_g3h 13.07v
pp5v5_s5 5.12v
pp3v3_s5...
Board had a tiny bit of corrosion on U3540, replaced that and now it gets stuck around 0.360A steady no loop.
VCORE 1.8V steady, no LIO flex or SMC bypass same thing.
Already tried:
Clean known good BIOS
Raballed CPU
PP3V3_SUS 3.3V
PLT_RESET_L present 3.3V
PLT_RST_BUF_L 3.3V
ALL_SYS_PWRGD...
Clean board, customer states that while trying to update Mac gave him an error and Mac wont install any new OS past Catalina, we tested and the problem we can replicate here.
Installing Catalina no problem, but intalling from scratch or updating past Catalina wont work it states that it is not...
I have a few boards from the past that all have the same problem:
PPBUS 8.6V
5V_S5 5V
3V3_S5 3.3V
PPVRTC_G3H 3.3V
But PCH_INTRUDER_L is around 2V and PCH_INTVRMEN is around 2.1V on ALL of them I have tried to force the signal with a 100K resistor, the voltage goes up to 2.9V (I am not sure if...
Clean board no corrosion.
T2 was restored and clean install of MacOS via internet already done.
Mac only boots OS in safe mode, normal mode bar gets stuck and or after loading about halve way the bar and all else disappears and nothing happens after that.
Board was tested on a known good...
Clean board, already tried clean ME, different SSD with clean install of MacOS and the result is the same, Mac chimes, bar starts to load and sometimes it may get to the end but OS never loads, starting in recovery mode same thing.
When staring in Verbose mode gets stuck in: " In memory Panic...
Board was repaired a few months ago with SMC replaced and some corrosion clean up, now is back.
PPBUS 8.6V
I get green then orange light on original charger.
I can trace the fluctuations as early as SMC_PM_G2_EN this fluctuates around 1.1V to 1.8V.
Diode reading in all related rails are ok and...
Board had little corrosion at C7226 and cap fell off with a little push, check before removing cap and there was no short
Restoring T2 gives error about giving up waiting to transition from DFU to DFU
3v3_G3H_RTC : 3.3V
PP1V1_SLPS2R : 1.1V
PP1V8_SLPS2R : 1.8V
PP0V8_SLPS2R : 0.7V
PP1V2_AWAKE ...
Clean board, when first came in one port had 20V and the other had 5V with battery connected, when checking the bad port PPVBUS_USBC0 had 0.5V when I as connected to the other port, after replacing UF400 that went away and now I have 20V on both ports but only with battery connected but 0A and...
Board was corroded around R5150, U6100 and U8160, all those chips were worked on and fixed, board worked fine for a few days and now it is back with PP5V_S4RS3 missing, diode mode here is correct.
PPBUS 8.6V
PP5V_S5 5V
PP3V3_S5 3.3V
PP3V3_SUS 3.3V
When I Trigger SMC_ONOFF_L there is a drop...
Clean board, no history.
OS was reinstalled clean via DFU.
Battery is recognized in OS but shows fair state and wont charge past 1% this is the original battery and it looks in good condition physically, exact same thing happens with new battery.
Already replaced U5200 same thing, in this...