This board had liquid damage and works boots normal and passes all diagnostics but it willl not stay in s5 state after its turned off either by holding down the power button or shutting down through the OS. I thought it was a semi stuck power button or something along the lines of the SMC ONOFF getting pulled down intermittently or enough to be around threshhold but the board will not stay shut down out side of the mac either - I tested with board out and only external keyboard and display attached and then shutting down. I also tried different operating system to make sure it wasn't an OS glitch needing reinstall or something.
SMC ONOFF is steady 3.42V with no signs of pulsing or dropping. I checked circuits related to SMC ONOFF no signs of corrosion and resistors have good values. Replaced U5110 to see if any difference. Checked keyboard and trackpad connectors and touched them up. Nothing looks to be around connectors or underneath. Reflowed SMC.
Is there another signal that would cause the board to boot after shutting down without causing any other issues? My only other guess is something up with the SMC.
SMC ONOFF is steady 3.42V with no signs of pulsing or dropping. I checked circuits related to SMC ONOFF no signs of corrosion and resistors have good values. Replaced U5110 to see if any difference. Checked keyboard and trackpad connectors and touched them up. Nothing looks to be around connectors or underneath. Reflowed SMC.
Is there another signal that would cause the board to boot after shutting down without causing any other issues? My only other guess is something up with the SMC.