820-00165 keys and trackpad not working

[Neil250]

Machine was booting to the desktop originally, login in fine BUT would not charge battery AND WOULD not run on battery
alone.

Keyboard and trackpad working fine.

I decided to change the ISL625 chip.

Good news: the battery now appears to charge and machine continues to boot to the desktop.

Bad news, keyboard and trackpad now no longer work.
Machine also now ONLY works on battery and charger blinking green on ac adapter. No fan spin.

Disconnect AC adapter, connect battery--> fan spin and boot to desktop but NO trackpad or keyboard.
Connect AC adapter and battery appears to be charging. Solid orange light on magsafe aletrnating with flashing green every 3 seconds.

PPBUS G3H: 4.32V on AC ADAPTER
PPBUS G3H: 6.91V on BATTERY


Suspected DC IN leak: D7012 appeared cracked and shorted.

Replaced it. Remove battery, attach AC adapter.
Green light flashing continues. PPBUS_G3H bounces between 2.5V and 4.5 V.
Connect battery.
PPBUS_G3H bounces between 6.90V

Strange thing is that I started this whole sequence with the machine not working on battery and booting on AC power.
Now I have the opposite but the trackpad and mouse dont work in either case.

My question now:

?Q7180? does it need to be replaced.
I don't have a stable correct PPBus_G3H so the other option is start looking at U7100.

I am assuming I have to back up and look at why I dont have PPBUS_G3H

 

[2informaticos]

Probably bad solders at U7100.

Amber light on Magsafe 2 doesn't mean the battery is charging; you get it even without battery!
Magsafe 2 switches to green light only when the battery is fully charged.

Trackpad/keyboard not working before loading macOS too?
Check if you can access boot menu.
Try known good trackpad flex/board.

Do you get stable 3V42_G3H voltage?
Also check if DCIN_G3H fluctuates.
Did you try with fake charger, or lab PSU?

 

[Neil250]

cleaned pads and resoldered U7100
Machine now boots and charges
trackpad works and keyboard works

Thanks!