Recent content by 2informaticos

I meant to check on that power rail (LDO), where you've said to have lower reading than expected.

Did you check diode mode once U2890 was removed? Each chip has a filter cap near the power pin.

If S5 LED goes off, test replacing Q8110.

Not sure which chip may be involved only with this issue. Sometime bad flex can cause such problem; you've said already tested. https://boards.rossmanngroup.com/threads/macbook-air-m2-a2681-touchpad-keyboard-issue-lid.64702/ One friend mentioned he directly changed all small chips related with...

Check if board starts with airport connected and just one RAM module inserted.

Just for test, interchange trackpad board/flex between both machines; if are the exact same model/year.

Is the machine recognized in DFU mode?

Did you test after changing U3404? If the MOSFETs have the same pin output, no problem to replace.

What about U8100 and U7700 LDOs?

Just in case, test on good machine if trackpad works correctly without daughter board connected.

It should work.

So problem appears only when the airport card receives 3.3V power. Try replacing Q3403 and/or U3404.

The chips from page 57 are simple level shifters, no firmware included. Try to find a LSF0101 from other board.

Replace UD102...