M2 MacBook 820-02536 No Trackpad/Keyboard

[rob777]

This machine had minor liquid damage, it needed a new lid angle sensor only which was replaced via Apple IRP program. Screen now opens and shuts as it should. It still has no trackpad or keyboard.
The following measurement were taken. As I can't find anything missing I am assuming I need to replace the trackpad or daughterboard. I don't have any good ones to test with though. Looking for a second opinion please.

IPD_PWR_EN_GATE: 1.8V
PP3V3_S2SW_IPD: 3.3V
PP5V_S2SW_IPD: 5.2V
PPBUS_AONSW_TPAD: 12.4V
PP1V8_S2SW: 1.8V
IPD_OCP_FLT: 0V reading another post on here that is supposed to be 0v

LT400: 12V both sides
LT402: 3.3V both sides
LT403: 5v both sides

UC860/1 has all the inputs

LT20x coils have their voltage both sides.

UT350/2 have 1.25v in and 3.3v outputs

Appreciate any help given, thanks.

 

[2informaticos]

Keyboard information goes to trackpad board (on the way to CPU).
So you need to have good working trackpad, to get also working keyboard.

If JT400 has all power lines, you should test with known good trackpad board/flex.
Just in case, inspect all circuitries from page 86.

 

[rob777]

Can please double check with you:

SPI_IPD_TOUCH_CS_CONN_L

Should not have voltage on it to be enabled. It has 3.3v so that would put it as disabled correct?

 

[2informaticos]

Not true I think.
You can compare with CS pin of any SPI chip; a BIOS from old boards, for example.
It isn't steady 0V.

 

[rob777]

An update as components just arrived and replaced ut350 and 352 and all working. Weird as both chips had their outputs but all is fixed. Thanks for your replies.