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checked with thermal cam and U7210 heated up, replaced it and now back to working and booting. But how do keyboard short out U7210?

Vcore 0V

sorry seems to been something wrong with first measurement. Now pp3v3_s0 there 3.3v. Have the bord on desk with only charger connected on all measurements

New to this boards. Some waterdamage in trackpad connector area and burned connector. Replaced shorted connector and worked. After connecting keyboard board died again, guess keyboard waterdamaged too. Board now have 20V and draws 0.15A ppbus_g3h 13.1 3V3_G3H 3.4 pp3v3_s4 3.3 pp5v_s4 5.12...

Checked R5370 and R5371 and the same measurements in diode mode Removed the silicone around SMC and put some flux around it then a quick heat up. Now measurements seems fine 0.637 in diode mode and tsOp error are gone. Some testing left

I now working on a 820-3662 board with no signs of water damage and really looks like new. EFI shows tsOp error and reading -124 Tried new trackpad and cables with no change Connector looks like new All hints I can find are measurement on pin 19 shows 0.502 in doide mode and should be around...

Ok, thank you did not know that. But first of all I have to fix ram issue.

why change them?

replaced U7400 and starting up but with 3 beeps PP1V35_s3 now 1.35v and vcore are there

Working on a 820-3662 with no signs of water damage. Costumer says he turned it of and the next day it wont start again. Wont start at all without battery With battery I get fan spin but no vcore present. 14.7 ohm to ground on ppvcc_s0_cpu but 0V L7310 get 0V PP5V_S0 5v ALL_SYS_PWRGD 0.04v...

you dont have a one I can test?

oh, downloaded from this forum cant say, about a year ago =)

tried one I found with clean me but no change but with the difference bklt dont start do you have any for this board?

tested with my external drive and dont seems to read from it. just lights up not flashing as it should when it reads. An on psu the amps very stable at about 0.616 amp. its not no video it seems it wont start up as it should

Of coarse I tried known good screen and without ssd, always use correct charger. No video on external screen but lights up So still no video

Working on a 820-00165 and cant figure out why im not getting video. No sign of waterdamage, clean and nice Starts up but no chime and no video Backlight working and test with mouse lights up. SMC_LID 3.4v EDP_PANEL_PWR 3.3v PPVCC_S0_CPU 1.8v P3V3_S0SW_LCD 3.28v

Working on a 820-00165 with no backlight Have video but backlight missing PPHV_S0SW_LCDBKLT 24 v BKL_PWM 0.44v BKLT_EN 2.88v

yes one more donor board =) Boring with this cards piled for a year.

its still not booting ppvcc_s0_cpu short to ground 0.3 ohm and 0V

after ultrasonic PP5V_S0 5.16v PP3V3_S3 3.3v PP3V3_S0 . 3.3v fan spin for 15 sec then stops then speed up and constant spinning cpu getting hot