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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.
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?
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...
I’m stuck, need some advice please. This board works fine on charger with no battery installed.
With a charged battery and no charger it also boots and works fine.
When battery is installed and you plug charger in, the icon says not charging the battery briefly then shows no charger connected...
Yeh I know better. You are exactly right. Unfortunately because I have no patience, frustration at myself and then desperation lead here..
Anyway yes 3.3v is there as well as tpad_vbus_en 3.3v
Have traced all keyboard and trackpad pins back to U4801 too.
Put a new u4801 on - no change
found it wasn’t doing a smc reset changed q4801 u4850 and u5110 started doing an smc reset but no working keyboard or trackpad.
Smc reset has stopped working again now. Reflowed smc cause getting desperate. No change.
So as of right now. External mouse works...
Changed trackpad and flex already. Was minor water damage but not there trackpad or keyboard areas.
keyboard has 3.3v at pin 30
and 3.4v at pin 4
trackpad has 5v pin 4 and 3.3v at pin 1
at one stage when testing pin1 on trackpad I touched ground too and it shorted and I had to replace r4808...
Bloody hell, just found R7125 was missing, not even there. I can't believe I missed it.. Put one on and I have 12.57v at F7140 now. Put back and we have fan spin and a Apple logo