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I'm lost with this board. Now I have no 18.5V at tracpad connector J5800. no Z2_Boost_EN WITH trackpad connected (tried multiple AND new j5800 just out of desperation). Does keyboard ALSO need to be connected? I have 3V3_S4 at J5800. Something must not be getting to J5800 for it to send 3.3V to Z2_Boost_EN?
Yes J4700 works. I was able to get 18.5V back at j5800. I'll check voltage again TO U2700 but if that's ok i assume its a trace from U2700 to next stop but not sure what the data output pins are on U2700 OR it looks like USB may also come through U2700?
Best I can tell it has to be PCH. Could I run jumpers to send data through USB? or different route to test or maybe as alternative to junking the board?
No change. I MUST have an issue with U5701 then, correct? I've tried other tracks and keyboards... tried completely different top case, etc... as well as I think this was the 3rd U5701!