Hello out there.

I purchased this mac MacBook Pro 13'' M2 chip, model A2338, logic board number 820-02773 as partially working. Seller give me an apple report saying: "Liquid spill on trackpad flat, BMU battery flat and logic board. Macbook starts only when connected to DC IN and show intermittent shoutdown".

Now ,that I got, it is does not start at all, usb Amp mether shows 5V 0A on both usb-c. Connecting to the transformer adapter side (not logic board side) I can detect 5.237V and 0.034A.

Tearing down the logic board I can confirm there was liquid spill on the battery connector area and the battery flat. Liquid spill also on the trackpad connector and small amount on the antenna wifi connectors.

The back side of the board is pretty clean, no sings of corrosion or cleaning.

The fact is that this moderboard was already cleaned from moisture.

no components it's getting hot when plugged in.

Upon cheking, no low resistance found at each inductor / coil on the board.

PPBUS_AON
1 PPBUS_AON 12.3V
2 PPVIN_LCDBKLT_F 12.3V

PP3v8_AON
L5800
1 P3V8AON_VSW1 3.78V
2 PP3V8AON_PH1 3.78V

PPDCIN_AON_CHGR_R 5V on both ports

LDO outputs

PP3V3_UPC1_LDO 3.44V
PP1V5_UPC1_LDO_CORE 1.58V

PP3V3_UPC0_LDO 3.44V
PP1V5_UPC0_LDO_CORE 1.58V

CD3217 support voltages

CC270
PP5V_S2 0V

RG2A0
1 PP3V3_S2_LDO 0V
2 PP3V3_UF790 0.34V

PP3V3_S2_USBLS1_ISNS 0V
PP3V3_S2_WLBT_ISNS 0V
PP1V25_S2 0V

RC714
P3V3S2_PWR_EN 0V
P3V3S2_EN 0V

PPBUS_AON_3V3S2_VIN_ISNS 12.30V

LC260
1 P5VS2TPS_PHASE 0V
2 PP5V_S2 0V

P5VS2_PWR_EN_RC 0V

PP1V5_LDOINT_MPMU 1.48V

PP17V0_LDOIN 3.30V.

resistance to ground of PP3v3_S2.
CC717
pin1 PP3v3_S2 35 ( 2000K scale on multimeter) ohms
pin0 gnd 0 ohms

Upon cheking, no low resistance found at each inductor / coil on the board.

U8100 LDO OUTPUT

PP1V8_AON 0.18V

PP3V3_S2_LDO 0V

PP1V2_AWAKE_PLL 0V

PP1V8_AON_MPMU 1.80V

PP1V2_AON_MPMU 1.20V

PP3V3_AON 0.35V

PP0V855_S2SW_CIO 0V

PP3V3_S2SW_SNS 0V

PP1V2_S2_CIO 0V

PP1V5_LDOINT_MPMU 1.49V

U8100 LDO INPUT

PP3V8_AON_MPMU_ISNS_VIN 3.77V

PPVDD_LDO20_14_8_3 0V

PPVDD_S2SW_VDD2H 0V

U8100

PP3V8_AON_MPMU_ISNS_VIN
CY1M3 3.77V

PPVDD_LDO20_14_8_3
C8300 0V DIODIE MODE 269

PPVDD_S2SW_VDD2H
C83B1 0V DIODE MODE 36

PP1V8_AON
R8620 1.79V

PP3V3_S2_LDO
C8331 0V DIODE MODE 1.25 (20k multimeter scale)

PP1V2_AWAKE_PLL
C8360 0V DIODE MODE 358

PP1V8_AON_MPMU
C84A0 1.79V

PP1V2_AON_MPMU
C8341 1.19V

PP3V3_AON
C83A0 0.33V (CLIKING SOUND WHEN MEASURING) DIODE MODE 0.84 (20K SCALE MULTIMETER)

PP0V855_S2SW_CIO
C83B5 0V DIODE MODE 0.54 (20K SCALE MULTIMETER)

PP3V3_S2SW_SNS
C83D0 0V DIODE MODE 488

PP1V2_S2_CIO
C8350 0V DIODE MODE 01.19 (20K SCALE MULTIMETER)

PP1V5_LDOINT_MPMU
C8380 1.50V

U7700

PP3V8_AON_SPMU_ISNS_VIN
CY1S5 3.77V

PP1V25_S2
RT311 0V DIODE MODE 246

PP0V88_S1
C77C1 0V DIODE MODE 01.27 (20K SCALE MULTIMETER)

PP0V72_S2_VDD_LOW
C7840 0V DIODE MODE 256

PP1V8_AON_SPMU
C7891 1.80V

PP1V2_AON_SPMU
C78A0 1.20V

PP0V8_S1_VDD_FIXED
C78C0 0V DIODE MODE 0.35 (20K SCALE MULTIMETER)

PP1V5_LDOINT_SPMU
C7810 1.50V

is that normal in PP3V3_AON VLDO10 U8100 I got 0.33v? And hear that cliking sound?

PP3V8_AON_SPMU_ISNS_VIN
CY1S5 3.77V

RD580 voltages
TPE018
TP_ISNS_SPMUHS_N ISNS_SPMUHS_N 3.77V
TPE017
TP_ISNS_SPMUHS_P ISNS_SPMUHS_P 3.77V
CY1SB
PP3V8_AON_SPMU_ISNS_VIN 3.77V
CY247
PP3V8_AON 3.77V

good board farfan14 measurement / my faulty board format:

PPBUS_AON 12.28v 480/ 588 12.32V

PP3v8_AON 3.8v 157/ 374 3.77V

PP3v3_S2 0v 402/ 470 0V

P3V3S2_SW 0v 402/ 470 0V

P3v3S2_EN 0v 703/ 950 0V

PP1V8_S2 0V 336/ 392 0V

P3V3S2_DSCHG_EN_RC 3.45V 523/ 578 3.40V

PP5v_S2 0v 435/ 518 0V

PP1v25_S2 0V 243/ 272 0V

PP3V3_S2
USBLS1_ISNS 0V 445/ 485 0V

PP3V3_S2SW_SNS 0v 493/ 599 0V

PP3V3_S2_LDO 0v 445/ 484 0V

PP3V3_S2_WLBT_ISNS 0v 402/ 465 0V

QC410
1 GND
2 P3V3_S2_PWR_EN_R 0V
3 P3V3S2_DSCHG 0V
4 GND
5 P3V3S2_DSCHG_EN_RC 3.4V
6 P3V3S2_DSCHG_EN_RC 3.4V