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POS is fixed. Was either C7125 or I haven’t been putting Q7130 on properly. What a nightmare. Over 4hrs spent

And now q7130 has shorted to ground again. Going round in circles.

Replaced q7130 again. Don’t have the continuinty to pin 10 anymore. F7140 is only 2v tho so I have something pulling it down I suppose.

Yes f7140 has 16v on charger I just replaced C7125 anyway On Q7130 I have continuity from pins 2/3/4/9 to pin 10. This isn’t correct is it?

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...

Smc_lid is 3.42v

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...

Can mark as solved

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

I figured the same and have stared at it and tested it for hours now.16.25v both sides

removed it sits at 4.8v

ok found sense resistors for charger, checked charger BMON current sense R5429 is 300k and R5439 AMON sense is 45.3k both read 0v

Pin 2 16.45v 3.9 ohms pin17/18 20.4 ohms Pin27/28 Which is correct from my understanding.

no I haven't but they are on system side aren't they?

Board had liquid damaged exclusively around U7100, cannot find evidence elsewhere. Board gets orange and green lights on charger but not power on. PPBUS_G3H measures a fluctuating 3.9 - 4.1v, removed F7140 and PPVBAT_G3H_CHRG_REG measures the same fluctuation. Changed U7100 numerous times...

Replaced Q7035, Q7030 another u7000 from donor board. Pin 27/28 is 20.1ohm Pin 16/17 is 2.9ohms there is 16v on pin 2 U7000 0v on pin 3 U7000 smc_bc_acok is missing again too and ppbus_g3h is now 0.5v i replaced u7000 three times. All from donor board. Does anyone wanna help me persist with...

Upon injecting voltage Q7035 gets very very hot so will change that next

With no F7040 I get between 25 and 30ohms across all pins and Pin 2 F040 gets 144ohms. So short from system side then?