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before and after removal the 3v42 rails are quite low. 10 ohms short to ground, so must be a cap, should i inject voltage and see what heats?

thermal cam showing r7020 heating up and u7090

ppbus on D7005 is only on 0.5v

im getting 20v on the DCin side and 15v on pp20v

U7100 pin 9 - 0.030v pin 15 - 0.065v As i was measuring this, the R7020 blew up. I think i might've plugged in the charger wrong because there's no green light. have replaced it with another resister with the same marking "470" but still no green light. What did i do :(

820-00138 turns on, battery error symbol, then turns off. Works fine in SMC bypass. So sensor issue? How do I sort sensor issue.

so been testing this machine and it magically worked after ultra sonic. customer is happy. SOLVED

thank you,tried it on this one and nothing

SMC bypass works woo!!!! No backlight though. So it's a sensor issue? no pulse on l7520 which is what i think you meant ppbus is 8.58 well i thought it didnt charge the battery but after the ultrasonic it does. also it's showing the batt symbol and fan spin without bypass when battery is...

ok, have tried smc bypass mode, doesn't work

is SMC bypass where i have to run a wire to ground repeatedly? How do I do that? thanks!

Hi there water damaged 820-00165 here. All S5 rails present. Thermal cam shows isl6259 has a tiny bit of heat. but i suppose it's expected I'm about to put it in the ultrasonic cleaner

PPbus is 12.58v U7501 pin 23 is 12.58 pin 13 is pulsing between 0 and 2v pin 22 is 3.3v pin 29 is is sometimes 0, 2.5 and 5 pin 12 pulsing between 0 and 3.3 pin 21 pulsing between 0 and 3.4 pin 4 0v 3v42 is stable at 3.4v

Have an 820-3476 with green light. I think it had liquid damage initially but someone else has already messed with the board so i can't really tell It has green light. Have started going down the power rail list. everything looks normal and i've stopped at the 5v rails because they are acting...

so oscilloscope is necessary now?

PM_PWRBTN_L reacts and drops from 3.4v to 0.3v. is that close enough?

I think i have good news! i soldered a bigger wire to smc_onoff, and PM_SLP_S5_L and PM_SLP_S4_L are consistently responding to rapid triggering s5 goes to 0.002 and s4 goes to 0.03 consistently. However PM_SLP_S3_L is not responding at all. it's dead

shit, the PCH is the CPU??

so i basically tested for continuity on SPI_CS0_L and it's ok :(

came accross this vid of rossmann with what looks like the exact same issue https://www.youtube.com/watch?v=uvRaC3VUYR0&list=PLkVbIsAWN2lsjujIe9sbzDDXwQJHShVGI