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820-00281A board came in with a liquid spill on keyboard over right side speaker mesh. No sign of corrosion or damage on board. Macbook powered on normally. Replaced faulty right side speaker. On boot up it now forces you into "A critical software update is required.... Cant be used until...

not getting any fan spin. r1410 is only reading 7.7k ohms. i took the resistor off and it read 10ohm. I replaced it for fun but went back down to 7.7ohms and still no fan spin. should i change q3000 and smc to fix maybe?

I am using an original 85W charger. W/ battery&charger connected PM_BATLOW_L is .156v reading in diode is .49 (with no battery)

SMC_ADAPTER_EN is 3.4 PM_DSW_PWRGD is 3.44 PCH_DSWVRMEN is 3.2 PM_BATLOW_L is .245 PCH_CLK32K_RTCX is .411 PCH_INTRUDER_L is 3.06 PCH_INTVRMEN is 3.34 PCH_SRTCRST_L is 3.34 RTC_RESET_L is 3.34

Neither S3 or S4 have voltage/pulse

There is a drop pulse at PM_PWRBTN_L when triggering SMC_ONOFF_L

I have a 820-00165-A board, no power. Slight corrosion on C6100 which was cleaned up. No other signs of damage or corrosion. ppbus_g3h is 8.59 pp_3v42 is 3.44 pp3v3_sus is 3.3

nevermind. fixed it. q6060 was corroded.

board was liquid damaged. replaced u7000 and backlight ic. now computer is turning on but has high fan spin. tried with new keyboard/trackpad/flex still same. attached is sensor temps. everything looks good to me but maybe i'm reading it wrong.

Sorry was out for the weekend, but solved. SMC_LID was good. The Battery Indicator flex was shorting the board. Thank you for the help.

820-3330-B , liquid damaged no signs of corrosion. No orange light & PP3V42 was not present, so I replaced u7000. Macbook powers on, but no battery is detected. If charger is disconnected screen turns off but still have capslock light and fan still spins. Tried with a new battery, no success.

C8469 was bad. yes testing board alone

came in with liquid damage on backlight area. cleaned it out and fixed a short on the board, but still no backlight. accidentally grabbed a wrong test lcd and put a 2016 lcd on this 2020 mlb. now i have no boot. i get 20v and draws up to .8 amps but after 20 seconds turns itself off. i'm...

okay, i put back R8455 and R8481 but i still don't have backlight. can you help me rule everything else out before i have to replace t2? the board is booting up and everything else is working exepct backlight. wouldn't this mean t2 is sill good?

i checked the traces from the board and double checked with the schematic. can you help me understand because i checked it and i thought it was connected. Topside of r8452 is connected to pp5v_g3s which is also connected to r8453 bottom side of r8452 is connected to I2C_BKLT_SCL which is...

I have a computer that came in water damaged, powers on with no backlight. Corroded area was around C8560, rest of the board is clean. R8452 was missing w/ no pads & U8472 Hole in it. We jumped R8452 to R8453 & R8450. During the replacement of U8472, R8455 & R8481 may have been blown off. I...

yes. i tried with just file. everything was working except long startup time, then same with serial number change.

thats' the one i used

i used the bios from duke here: https://boards.rossmanngroup.com/threads/820-3437-not-loading-installing-osx.37967/ i assumed he already cleaned the me?

that video worked. all is working but it still takes about 30 seconds to chime.