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Seems the keyboard is interfering. If I disconnect the keyboard, it turns on fine and stays on. Power button held on maybe.
Anyone know what to short to trigger the equivalent of pressing the power button? I don't have a spare keyboard for this model.
I started testing all caps and resistors on the PBUS side between U7000 and F7000, found R7062 (which should be a 1ohm 0201 resistor reading as 147ohms so U7000 probably thought there was a ton of drain with that at 147ohm.
Swapped R7062 out and now I have a solid 12.95v on PPBUS_G3H up to...
Ive taken F7000 off the board to see if PPBUS_G3H fluctuates on the pin one side of the fuse when its not continuing on to the system. Its still fluctuating but not as much (or my meter can't see it) it looks like its going from 7v to 12.95v repeatedly
Replaced U7000. Getting 5v on VDDA & VDDP now. Still have an issue with PPBUS_G3H as it?s jumping between 3.6v and 12.95 continuously.
I can?t get it to start in SMC bypass either, I just get a fast fan for 2 seconds and it goes off again
Pin 27 on U7000 is a direct connection to Pin 2 of R6991 from what I can tell.
As I'm not getting anything on R6991 I wanted to look at U7000 to see if it is even getting the voltages it needs, but I'm not good enough at understanding the schematic just yet.
Could someone better than me let me...