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Hello 2informaticos,
This board was liquid damaged, with shorted P5V_PS2 line at U5700, shorted UP710, burned LP670 due to the screen and burned trace related to backlight ic UP800. Even the screen was not powering on because internal lcd IC chip was shorting PP5V_SW_LCD.
I was able to fix all...
I have this board with no liquid damage, stopped on its own as customer reports.
PPBUS_G3H 12,62V
PP3V3_G3H 3.3v
PP3V3_G3H_RTC 3.3V
PP5V_G3S 5V
PP3V3_G3S 3.3V
PP1V8_G3S 0V / 0.318
PP1V8_S5 0V / 0.466
PP3V3_S5 0V / 0.320
PP1V1_SLPS2R 1.1V
PP1V1_SLPDDR 0V / 0.365
Coils around PMIC
PP1V8_SSD...
I have a Liquid damage board around U7230, Power button, U9000 and U9080 areas.
Cleaned all corrosion (minor) and replaced R4922.
20V on usbc meter with 100-95mA on all ports.
With battery current draw is only 500-700mA however battery seems a little bit inflated...
P1V1SLPS2R_FB 1.1V...
This one has no liquid, is clean and just died one day on its own. Customer powered it off and it never powered on again.
I 've checked all these signals for PM_SL_S4_L and they are present.
PPVRTC_G3H
RTC_RESET_L
PCH_SRTCRST_L
PCH_INTVRMEN
PCH_DSWVRMEN
PCH_CLK32K_RTCX1
PP3V3_S5
PM_DSW_PWRGD...
Liquid damage on this one, I found it difficult and time consuming.
1) It had a full short on C6990 PPVIN_G3H_P3V3G3H, replaced the cap and short gone.
2)Next, it had PP3V3_G3H low voltage around 2.2V. Diode mode was showing 0.340 very similar to other working boards however resistance to...
Hi there, this was a liquid damage with PPBUS shorted at u7430 (Pin 5 CPUGT_BOOT2_RC was burned shorted with ground along with pin 6 PPBUS_HS_CPU).
There was also minor corrosion at other spots like PMIC an TPS51980.
Replaced U7430 and short gone. Cleaned also corrosion everywhere.
The board is...
Got this logicboard with liquid damage, initially both CD3215 were shot, first one with one LDO shorted and second one with PP1.8V_SLPS2R shorted and an LDO shorted. First port was 5V 0A, second port was 5V going 0.2 to 0.43A. Replaced both CD3215 and I have no more short.
Board is now stuck...
This board was liquid damage, no power, with the lcd flex burned, connector on the board is intact.
I Fixed the liquid and managed to get the board to boot, however there is backlight but no image. I tested different screens known to be working.
I also ruled out lcd flex cable, ssd, pram and...
I received this logicboard with water damage. Initially it was stuck at 5V, ISL6294 had to be replaced and I restored the sensing resistors and traces witch bring back 20V and it is now able to charge a battery.
Without the battery it stabilizes to 0.40A and cycle again .
The fan spins very...
No water damage, this board was not powering up because it had PP0V9_TBT_X_SVR and PP3V3_TBT_X_S0 shorted to ground.
Removed R5640 to isolate PP3V3_S0 and board powered on fine and charged great but obviously no usb Data or HDMI output.
I replaced U2800 with a preballed one and put back R5640...
This board came with liquid damage on the ports side, the flex and the connector (port A portion) on the board were burned and shorting the 20V rail.
I Replaced the flex and the connector on the board and the short went from the 20V rail. The laptop boots ans charges.
However when charging the...
This 2012 15'' 820-3330 was brain dead with all rails, not booting, no usb mouse activity.
I read the bios with the medusa and had an "Error read blockxxxx not found..." (apologies didn't write exactly the error)... Tried a random testing 820-3330 bios and it worked and booted correctly.
I...
Got this liquid damage board. I have 20V on usb-c meter.
With battery I get 20V 2A so it seems charging well, the fan spins also with and without charging cable. Without battery I get 20V 0.55A.
Board reacts to power button, opening the lid, pressing the trackpad or a keyboard key. I can see...
This iMac comes from companies returns. It was EFI locked, I did the mistake to solder the bios to an adapter and read it with the medusa 3.
Instead of getting an incompatible error message because the medusa 3 doesn't support it (at least the firmware I have), the medusa read only half the chip...
Got this board slightly water damaged, It is stuck at 20V 0A.
PPBUS_G3H is 12,60V
PP3V3_S5 is 0V and no short diode mode is
PP3V3_G3H_PMU_VDDMAIN 3.3V
PP1V1_SLPS2R 1.1V
PP1V1_SLPDDR 1.1V
PP3V3_G3H_RTC 3.3V
PP1V8_SLPS2R 1.8V
PP3V3_AWAKE 3.3V
PP5V_G3S 5V
PMU_ONOFF_L 3.3 V
I must admit I really...
This board was liquid damage with 5V 0A. Corrosion at cd3215 and nearby, also the PI3USB32 chip (the one we don't see on schematic &brdvw) was corroded.
Reflowed both of them and replaced all resistors around both CD32s.
Now I get 20v 0A and ppbus_g3h 0V with no short (diode mode 0,410)...
This board was 5V 0A with PPBUS_G3H missing and full shorted to ground. No liquid at all.
Traced back the short to U9080 TPS62180 ssd's regulator, it was visually totally blown.
Once I removed the short on PPBUS_G3H I noticed both SDD nands U8600 and U8700 were totally shorted (very hot)...
This one is a liquid damage board.
PPBUS_G3H is 13,06V, I got 20V and it charges the battery just fine.
Without battery it is stuck with 20V@0A
I am in S0 state and all rails on the power rail page are present except for the cpu:
PPVCCPU_S0G = 0V
PPVCCSA_S0G = 0V
PPVCCGT_S0G = 0V
On U7800...
This one looks clean, I have 5V 0A.
PP1V8_SLPS2R is missing and diode mode is 0.330 seems a little bit off from 0,390 so I am not sure... resistance to ground is high on both boards arounf 500kOhms.
PPBUS_G3H is 0,42V with no short, diode mode is 0,455 same compared with other board.
PP3V3_G3H...
This logicboard had water damage causing backlight issue, crap near SMC and ISL6259 but no heavy damaged components.
Cleaned everything reflowed SMC to make sure.
At this point, it boots all ok with battery, it charges when magsafe is plugged in. AHT test doesn't show any error.
It will start...