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SMC_ONOFF_L is open at the power button (R4911) but measures fine at R5170. A break somewhere in the line apparently.

This board was pretty clean. After replacing a few components around UA900, it's booting normally but the power button is not working. Nothing happens when I hold it down. I tried another button. No change. Any ideas where to look for something like this? Everything around the power button is clean.

Ok, I haven't fully tested it for performance, but I'll try it. I'm going to put that capacitor back on and give it a try with fan control.

Isn't this issue going to slow the computer down? Isn't it being clocked down?

Yes, traces are all good. Continuity is there. I replaced Q5871 again just in case. No change. Removed C5871. Fan still spins up the same way. Nothing changed.

Not sure what to do with this besides give up. I replaced Q5871 because it got hit. I replaced U5870 also just in case. Q5872, Q5873, Q5874 are all good. Lines and measurements are all good compared to a good board.

The sensors are all inside of big chips? Is that correct? So my goal is to just look for blown traces/connections?

U5860 was where there was some light sign of the spill. I replaced U5860 and the 3 components above it. The fan still spins up but Heatpipe Outgoing Air is now down to a normal 30C. Everything seems very clean and solid around U5860, and in general. Nothing burnt. No blown pads or traces. The...

Solved. You got me there with BKLT_SD. Blown trace right above R8402. Pin 2 had no connection. Working great now. Thanks for the help.

No change after disconnecting webcam. I've tried this board in a known-good case and it does the same thing. Heatpipe Outgoing Air is at 128C. I'm trying now to figure out where that sensor is.

Everything seems normal. F8400 is good. EDP_BKLT_EN is at 3.3V D8410 measurements are good. 1) 1.116 2) .800

This board is fully functional but the fans spin up after a few seconds. I've tried it in an entirely different case and it does the same thing. I replaced Q5871 being that it was one of the few areas to be hit. No change. Online test shows no issues. I've attached pictures taken before...

To finish the story, in case it might help someone else in the same situation, I made a 3-second video that showed her activation lock screen and then the empty Startup Disk screen (to illustrate to her that the drive was indeed deleted by Erase Mac option in the recovery.) I sent that to her...

Send me a pm if you can and I'll respond

I can't figure out how to do a pm with the new forum. I only see Start Conversation, which seems to be public

Ok, thanks for the extra info. Unfortunately, she's already been paid so her interest in solving this is minimal at best. The nature of the business is that we pay people when the computer arrives and checks out model-wise/year-wise, but we don't actually work on these for days and most times...

Is there a way to DM you?

I'm using the 820-01598 schematic. This had a tiny bit of corrosion to the right of L8410. Other than that, it was really clean.

Ok, she's not willing to do either scenario where she gives out her passwords. I'm wondering if I did a DFU restore and deleted the SSD that way if that might allow this to progress. Maybe it might signal to her account that it's been deleted and then she can remove it? Is there any harm in...

Any thoughts on where to start with a backlight issue on this board that had a very minimal spill? I can't find any sign of the spill or any physical damage on the board. There is video but no backlight. Works on external monitor. Keyboard, trackpad, everything else works fine. I tested it with...