iPad not turning on

Hello everyone, looking for some advice. I have an iPad Air that just died and doesn't show any signs of life other than taking around 200ma when plugged in. I decided to change the battery but still have no positive signs of life. When plugged in with the new battery my meter shows current draw any where between 110 to 310ma. I believe the iPad is attempting to boot but isn't getting anywhere. I've tried all the button combination resets to no avail.

TIA

To add to this, I just checked the original battery and it has roughly 4v.