Do the following:
2.Get external charger 2amp recommended.
3.Charge it with external charger.
4.Charge for an hour and insert back battery.
5.Check if your phones question mark gone ...
I had a similar problem with my old HTC 8s. First i thought it's a hardware issue, but after cleaning micro usb port with ear buds and replacing my usb cable the phone started to charge properly. Some ...