Hi, Acer Aspire E15 E51-511-C7PH worked fine for a year, now powers off after a few minutes or secs

Hi, Acer Aspire E15 E51-511-C7PH powers off, I restart it and it powers off again.

I did a reset  to factory settings, restarted from system recovery, no good.

Battery charges, power supply works fine, what's wrong?

Thank you,