Phone shutting down randomly, unusable.

My Redmi Note 2 is randomly shutting down even when is connected to the charger. This started to happen after the battery swallen up, which was replaced with an original one.

I read online it coud be a rom problem but the is currently running the official global rom and I tryed the official chinese one but the issue persist, TWRP is not installed, fully stock rom.

So this can only be an hardware issue, any thoughts on what is causing the problem?

If I replace the motherboard will it fix the problem?