820-00165 don´t turn off

[madrefoca534]

Hi everyone, I have a 2017 MacBook Air with corrosion on the U6101 chip. The machine wouldn't turn on. I replaced the affected component and it turned on. Everything is normal, except that when I turn it off, it doesn't turn off completely. The system shuts down, the screen turns off, but the fan keeps spinning.
The same thing happens when I restart the system. I performed a fresh installation on another disk, thinking the problem was the operating system, but the result was the same.
I also noticed that when I turn on the machine, it takes approximately 25 seconds to boot.

I also performed PRAM, but nothing.
I need your help, please.

 

[2informaticos]

Both PM_SLP_S4_L and PM_SLP_S3_L signals stay high when machine is turned off?

 

[madrefoca534]

Thanks for responding. I honestly don't know.

But I replaced the EFI chip and the problem was solved. Now everything works normally.

 

[2informaticos]

Replaced from other board?
Then you will have weird issues in the future, as it has dirty ME region now.

 

[madrefoca534]

What I did after soldering the chip was install macOS Monterrey. Previously, the chip was installed on a motherboard with that operating system. After the installation, there were no region issues, and I even installed the latest updates without any problems.