iPhone 6s Draws no power when the battery is connected
We have a water damaged 6s that draws no power when the battery is connected, our USB Ammeter shows that with the battery connected draws 0.00mA but when we disconnect the battery we get 0.04mA-0.07mA.
It is a water damaged case and this has undergone a lot of ultrasonic cleansing. It did have a VCC_Main short on one of the (really) bad caps which has not been alleviated (I think a total of four caps, two of which weren't even fully connected were removed).
At first I was thinking U2 because when I connected the USB dock to the Ammeter and tested the battery terminals for voltages, I was getting 0.03V which is really low (have had a previous case like this where that is how I determined a U2 failure)
I did do a U2 swap which I am quite confident with and the 1.80V and 3V voltages it gives out are ok but I am in the same boat.
From this point on I'm wondering what avenues would be good to explore?