Chosen Solution
A friend asked me to look at this iPad after he tried a digitizer replacement and it failed to charge afterwards. Already tried new battery. My first thought was the battery connector pins but they look perfect. Second thought was a knocked off component near the connectors, but everything is intact. Can’t think of much else that can go wrong during a screen job… It is recognized by itunes but will randomly disconnects and reconnect every once in a while. Power consumption is weird. When plugged into PC it steadily pulls 0.48A. When plugged into phone charger it jumps around from 0.03A to 0.72A. Everything disconnected including screen. Left it on both chargers for an hour and battery went from 9% to 7%. Multimeter wont turn on so I can’t measure actual battery voltage right now. Tristar? Charge port? Anything easier to check before trying those?
The iPad Air develops issues with the charge port. Take a look at the screws that secure the charge port in place in the housing. If they are loose, you most likely have a charge port issue because that allows the charge port to move a little bit every time it is plugged and unplugged, eventually causing cracks on the flex itself. Sometimes these cracks are easily visible, other times, you have to do continuity probing across the flex. This requires a micro-soldering repair.
