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yes we have pulse on all big coils also pulse on ALL_SYS_PWRGD U1950 area looks good. Any more ideas? Or we hit a deadend?

Yes. Thanks for your help!

Pm_slp_s5_l - 0v pm_slp_s4_l - 0v pm_slp_s3_l - 0v pm_slp_s0_l - 0v

Trigger SMC_ONOFF_L and check for drop pulse at PM_PWRBTN_L - YES 3-0-3

L8304 we get 0V all the time! Sorry, I copy/paste the subscription, and this board was water damage. I already replaced all the bad components near U5000, U1900. And washed into ultrasonic machine. R7180 pin 1 missing. made a bridge between C7184 pin 1 and R7180 pin 1

SMC_ONOFF_L drop pulse 0.4-3.39V PM_PWRBTN_L drop pulse 0.4-3.3V PM_SLP_S0_L on smc trigger getting different V pulse between 0.4-1.4V PM_SLP_S3_L on smc trigger getting different V pulse between 0.2-0.8V PM_SLP_S4_L on smc trigger getting different V pulse between 0.4-1.4V PM_SLP_S5_L on smc...

Do you have steady 3V at SMC_ONOFF_L - YES

PM_PWRBTN_L - 3.41V sorry. I have USB activity, but not external video.

Short on all capacitors. Replaced one by one. C6422 was the bastard. Problem solved. Motherboard fixed. Extremely happy. Thanks for you help. Do you mind me asking how did you arrive to that conclusion? I understand the problem was with 5V_S5 line because the voltage was pulsating but how did...

L3095 0V L7520 5.13V L7701 0V L7560 3.36V L7310 pin 1 - 1.97V pin 2 - 1.8V L7320 pin 1 - 1.99V pin 2 - 1.8V L7130 pin 1 pulsating 5.90V - 7.2V pin 2 8.6V PPBUS_G3H is 8.6V and 3V42 is present 3.42V. PM_BATLOW_L - 3.31V PM_DSW_PWRGD. - 3.42V PM_RSMRST_L - 3.03V PM_PWRBTN_L - 1.0V PM_SLP_SUS_L -...

Normal mode: L7130 7.94 - pin 1 L7130 8.6V - pin 2 PPBUS_G3H is 8.6V and 3V42 is present 3.42V. use original Magsafe 2 charger- yes. PM_BATLOW_L - 3.31V PM_DSW_PWRGD. - 3.42V PM_RSMRST_L - 3.03V PM_PWRBTN_L - 1.04V PM_SLP_SUS_L - 3.34V

Called the customer. He confessed that it had previous liquid spill on keyboard over a year ago and keyboard was replaced. Worked fine ever since then until just recently. The battery ran out and after that does not go on. It should turn on with battery disconnected, right? PM_BATLOW_L - 3.28V...

In normal mode, 3V42 is stable? - YES Also check SMC_RESET_L - 3.12V and 5V_S5 - pulsating 2-5V Any pulse at ALL_SYS_PWRGD - 0V

Hi there, No signs of water damage. Magsafe charger switches from 5V to 20V. All main coils (and there are many on this board) - 0V, except for L7660 - 3.31V. No pulse on ON/OFF button press. SMC bypass - same. Though I am not sure if SMC bypass procedure is the same as on previous generation...

820-00164-A Hi, No water damage on the board. Value is board connected to power normally. L3095. 0V L7520 0V L7701 0V L7560 3.34V L7310 0V L7320 0V L7130 7.94 Value while you press the power button L7520 1.61V L7310 0.61V L7320 0.32V please advise how to proceed.Thanks.

Hi, No water damage on the board. First value is board connected to power normally. Second value is board in SMC bypass mode: L7130 - pulsating 12.14V-12.59V; 12.27V L3095 - 0; 0 L7560 - pulsating 1.0V-3.0V; 3.34V L7520 - pulsating 0.01V-0.07V; 0V L7430 - 0V; pulsating...

PPDCIN_G3H at J7000 - jumping between 16.51 - 16.68V R7012 measured onboard - 56.2k D7012 - not open. Tested in continuity mode between R7012 pin 2 to R7010 pin 2. BUT with my sharp eagle eye I saw that pin 2 of D7012 had the smallest oxidation I have ever seen. Replaced it and machine works...

No voltage on both PPBUS_G3H and 3V42_G3H. without LIO flex only with DC cable. PPBUS_G3H - 137 in diode mode 3V42_G3H - 328 in diode mode

Hi there, no water damage. No light on MG (1 out of 10 i get orange light that fades out), no fan spin, all coils 0V. Tested with good working io board and cable. Please advice how to proceed. Thanks!

Checked the resistors from "TPAD SPI WITH SRC TERMINATION" - all fine. Hooked up 3rd keyboard - works again. Installed still works. Fingures crossed it will keep that way. Maybe just a shitty batch of keyboards from China (though i try to stick to my reliable supplier). Thanks for your help!