Replacing a BGA chip?

check for shorts using diode mode, remove the chip and check again, if they have gone, the chip was bad.

Since I postes last, I actually had this happen to a customers tablet, the broke the usb port, I fixed it and then PMIC had a dead short
the (5v) VCC rail 99% of the time will go directly to the Power management controller (it'll go through an inductor first).

Seeing as this chip does get hot, either it is bad or something on it's OUTPUT is bad, could be a bad battery management IC (if that isn't integrated in the PMIC)..

Does the PMIC get hot WITHOUT the battery plugged in?
what is the voltage on the battery terminal on the motherboard, should be between 3.8v and 4.2v (or 4.39v but I doubt it uses that kind of cell, I think only iPhones do)

 

I'll test it and update you when I get my replacement chip.