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No obvious damage, good magsafe. Gets orange light, but ALL_SYS_PWRGD is stuck low and I don't quite understand how to follow back to see why. Power rails: PPDCIN_G3H: 20.85 PPBUS_G3H: 12.59 PP3V3_S5: 3.35 PP3V3_S4: 3.35 PP3V3_S3: 3.35 PP3V3_S0: 3.34 PP3V3_SUS: 3.35 PP5V_S5: 5.0 PP5V_S4: 5.0...

Correct. 0v for 12-15 seconds after adapter plug in. .898 to .900 for the rest of time.

Thanks PPVCC_S0_CPU : 0.899

Multiple liquid damage points. Near R8711 ssd 1v8 power was especially bad. Replaced and tested nearly everything in that section. Also found damage on cc805 and cc804 pins 1 pads were missing completely. Replaced and reattached with magnet wire. Nervous about that since it's CPU power...

dudipupan check this shiz out: https://boards.rossmanngroup.com/threads/820-00165-cpu-heats-up-draws-35a.60817/ I think we had basically the same issue after all power signals were good. Missing PLT_RESET_L so the PCH/CPU was in constant reset.

lol so i got impatient, and tomorrow's the day i'm supposed to tell the customer if it's fixable or not. reflowed the CPU at around 350c, with a lake of flux and full airflow. I paid attention to the CPU pcb mostly, kept away from the CPU die itself but did hit the pch die area after i felt...

My issues seem to mirror this person's: https://boards.rossmanngroup.com/threads/820-00165-powers-on-but-no-usb-activity-and-no-post.60774/#post-71615 Including the power off when I measure CPUVR_PGOOD_R. If I measure this between reboot cycles I can get a reading without it powering off.

PLT_RESET_L : 0 As an aside: Would it be OK to use my hot air station with a large nozzle or should I only use oven to reflow cpu?

Came in from another shop. Liquid damage was cleaned on U1950. Replaced chip, repaired 3.42 supply trace. U1950 seems good: 1. ALL_SYS_PWRGD: 3.3 2. CPUVR_PGOOD_R: 3.3 3. SYS_PWROK_R: 3.4 4. GND 5. PM_S0_PGOOD: 3.3 6. SMC_DELAYED : 3.4 7. PM_S0_PGOOD: 3.3 8. 3.4 present...

Thank you again 2. It was thankfully the PMIC. Had to reball a donor like 3 times because I've never been good at doing the real big chips, and it likes to fly off. I learned to control my airflow, change to a larger nozzle, and move my scope so i can blow straight down onto the chip...

PM_SLP_SUS_L shows .003 in diode mode. 10 ohms black on ground in resistance mode. U8200 removed = same. r1237 @ 100k out of circuit So PCH or PMIC? PMIC on the data lines that dead TVS diode was on.

It got better looks like. Am I wrong in not adding PP beforehand? Edit: when i reread this it looks like i'm being a jerk, i'm not. Maybe I measured at a different point before? Is .98 low enough to assert pm_slp_sus_l?

DCIN: 20V PPBUS/PPVBAT_G3H_CHGR_R: 12.6 3V3_G3H: 3.4 3V3_S4: 0 3V3_S5: 3.3 5V_S5: 5 5V_S4: 0 3V3_SUS: 3.3 1V2_S5_SMC_VDDC: 1.2 SMC_RST_L: 3.4 HPWR_EN_L: 3.38 1V_S5_PCH_BLAHBLAH: 1.0 TBA_VDDA/P: 5 PM_EN_P3V3_G3H: 5 SMC_BC_ACOK: 3.4 PLT_RST_L: 0 PM_SLP_S5_L: 0 PM_SLP_S4_L: 0 PM_SLP_SUS_L: 0.98...

Thanks, yes PPBUS is present at 12.60. I know that a 00281 and 00928 aren't compatible SMC wise, it was wishful thinking is all. I'll start going down the lines again to check I haven't lost anything else now.

HA! OK so SCL on J6951 (battery data cable) was low in diode mode. Replaced TVS diode D6950. Now it negotiates 20v at a normal speed, instead of taking 10 seconds or more. Board Takes .320 mA now according to ammeter. Same with a battery. I have one 00928 SMC if needed, don't suppose a 00281...

Yeah. I'm gonna try that actually. Thanks. It does actually take quite some time to get to 20v. Like 20 - 30 seconds, like it was a 2014 air going through 2 restarts before starting up

Yeah I saw your other thread where you found that. It's good unfortunately. :(

Did it again. Fresh 9239 from sealed package. Same exact result. :( Do these have SMC issues or BIOS issues? Would it be any use to remove the U7000 and provide diode measurements?

Diode mode, red on ground, PPBUS @ F7000 pin 2: .409 TBA_AUX_DET: 5.01v SMC_BC_ACOK 3.4v Removed Fuses, Plugged in adapter, C7050 .244v C7030/40: Both caps measure 110nf, after removing from board. Diode at REMOVED Fuses Pin 2: .398. Pin 1: .505

Customer says it just won't turn on. I tried another battery, and then another whole top case with new battery already installed. No change. 5v negotiates to 20v after about 10 seconds, .468A drops to .0178A after 20v reached. Dual mosfet gates never told to open by U7000 Inspection, pretty...