Boot loop when plugging charging cable or USB cable

I have Moto G2 (XT1068) 2014 edition. I was using stock rom (5.0.2)

How the Problem started:

Dropped the phone.

What is the Issue:

Cannot charged - When connecting to wall charger, the bootlodaer icon shows and again device restarts. But i can enter Fastboot Menu. The phone will charge for some time then again restarts and enters boot loop (If battery is completely drained then it should start and then display the charging animation rt?).

When connecting to PC via USB same thing happens. When i enter boot menu, it shows Charging for few minutes then it says Battery - OK. IT does not enter boot loop in this case. But when i select 'Recovery' or 'Normal Powerup' or 'Factory Reset', it goes to 'Powered by Android' screen and then again goes into boot loop.

What I have tried:

1. Tried some fastboot commands 'erase usedata' & 'erase cache'.

2. I tired flashing Stock firmware. Used this guide - http://www.droidviews.com/restore-mo...h...

3. I unlocked bootloader. Flashed TWRP. But issue is not resolved. I cant enter Recovery coz phone will boot loop.

4. i have unplugged battery from motherboard. Plugged in the charger so that it shows battery logo, then inserted battery again. But it goes to boot loop as soon as i insert batery.