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I can't reset smc reset the keyboard is not working. I have 3 new keyboards new trackpad and cable but i did manual SMC reset before on pin 5 on U5110 and when i do that the magsafe light switch from orange to green and back to orange so i know i reset the SMC and on your other question yes i...

PM_PWRBTN_L doesn't toggle when the power button is pressed/ pads shorted

Yes EDP_BKLT_EN is missing its hard to see if there is an image when i plug usb dongle is not lighting up i have PPVCC_S0_CPU and the SMC_LID is 3.4V

On Q7706 in pin 3 and 4 i have the same voltage so Q7706 doesn't open i checked the voltage divider the R7788 and R7789 are good but anyway i replace them and still im getting same voltage on 3 and 4 looks like the divider is not lowering the voltage. Any ides ?

No liquid damage on the board

SMC_ONOFF going to from 3,2V to 0v when i press the power button

SMC_LID is 3.2v and when i have the computer on and try to close the lid that shuts of the lCD and the fans stop spinning not sure what is the proper voltage on SMC_lid

yes the board is working fine just power button and pads issue

yes when i plug the charger powers on and i have green light

I have this 820-00138 can't power on or off neither power pads or keyboard and i have same working board to measure the voltage on SMC_ONOFF is same voltage like the working board. any ideas why board doesn't turn on and off ???

found it. i feel so stupid :o

I know it sounds stupid but i got 13 inch retina and before i open it i've noticed that the place on the housing for the magsafe charger is empty so i thought somebody probably remove it but when i removed the board i can't locate the connector for the magsafe

The liquid was around u7310 and 5VS4 is 0v . U7310 was shorting my PPVIN_S5_HS_COMPUTING_ISNS so after removing it the short was gone and i replaced it with another one

I have 3.3 v on the U7501 but i don get the 5 v on the other side

yes really light water damage. 5Vs4 is zero no pulsing

if im right i think i have to deal with the SMC because i'm missing P5VS4_EN and i don't have the PM_SLP_S5_L and SMC_S4_WAKESRC_EN

i will order cable do you think i'll need to try different trackpad too ?

Here strange thing I've noticed i started to measuring voltage on the trackpad connector and since all the board views i have all trackpad connectors have 22 pins bit this has 44 so it helped me just with the orientation of the connector so the pins closest to the edge of the board taking number...

i can't find U4820 and U4830 on board view because u use similar board view, Any suggestions please ?

i didn't swap Bios i fix the via's around the bios. Thanks for the hint ill check it now