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Battery + Charging without LCD - Machine turn on (I can hear the chime.) Voltages SDA is 3.3V. SCL is 3.3V Charging + LCD without Battery - Machine turn on Voltages SDA is 2.8V. SCL is 3.3V Battery + Charging + LCD Connected - Machine will not turn on. Voltages SDA is 3.3V. SCL is 3.3V No FAN...

Without Battery - All else connected. Device turns on but strangely no fans spin. Battery Connected + Display Disconnected Device Turns on.

It was a BAD CD3215. Replaced it with another. Now all ports with 20V and machine turns on without a battery. But with battery it will not turn on. tried a new battery too.

Had replaced the SSDs about a year ago. It came in for not turning on. PPBUS is at 12.6V. AMP Meter 20V and 0.05 Amps. PP2V5_SSD lines having 2.5V and pulsing every 23 seconds.

Replaced its still the same. Other Ports are now 20V and drawing amps but this corresponding port the amp meter will not turn on. CC1 and CC2 for this port is still low. Device will not turn on now.

Non Working Ports (TA) CC1 diode to Ground is 0.064 and CC2 is 0.161. Low compared to CC1/2 of of there port. (TB) BAD CD3215 ?

3 USB Ports show 5V and 0 Amp Draw and 1 Port USB C the amp meter will not turn on. Client used all 4 ports simultaneously for multiple peripherals always. Machine turns on and charges from the other 3 ports.

PLEASE HELP

Replaced U8100. Still the same.

Diode Mode to Ground : All diode readings are same. PP3v3_S2 is 3V PP3v3_S2_UPC is 0V. Isn't it odd?

Macbook A2338 PPBUS at 12.3V PP3v8-AON is 3.8V 3v3_S2 is 3V 5v_s2 is 0V 1v25_s2 is 0V PP3V8_AON_MPMU_ISNS_VIN is 3.8V PP1V5_VLDOINT_MPMU is 1.5V PP1V2_S2 is 0.2V PP3V3_S2_UPC is 0.2V PP1V8_AON_MPMU is 1.8V MPMU_VREF_ADC is 0V

These 2 are OL as well on my board but on a good board they have diode readings . ( I didn't check further) Should I just remove the connector and run jumper wires left to right or replace the connector ?

Ran a jumper from PP5v_s4 to PP5V_S4_P2V7NAND_LB (Not at the life boat connector) Now get all the necessary voltages. still the ssd will not show up.

5v_s4 on left side is present.

Voltages of SSD Side of J9600 PPVIN_2V7NAND_LB is 13V PP5V_S4_P2V7NAND_LB is 0V SSD_BOOT_LB_L is 1.8V SD_PWR_EN_LB_L is 0V STORAGE_LB_EN is 3.3V SSD_RESET_LB_L is 3.3V SSD_PCIE_CLKREQ_LB_L is 3.3V PCIE_SSD_D2R_LB_P<0> is 0V PCIE_SSD_D2R_LB_N<0> is 0V PCIE_SSD_R2D_LB_C_P<0> is 0.8V...

I have 0.8 Ohms between 43 and 44

I get 13V at PPVIN_2V7NAND_LB is that ok?

I am still unable to understand.Please guide me

Continuity Left/Right Means Resistance across pins on left and right lines. 45/46. 45/46 is 7.4M Ohms 43/44 is 6M Ohms 1/2 is 400k Ohms 4/5 is 1.7M OHms 7/8 is 100 k Ohms

PP3v3_g3h was shorted. Injected voltage and remove the cap. Now its flashing the question mark folder. R9350 and adjacent are okay. Checked every other thing in repair.wiki. How can I ensure dead NAND?