That you have the phone turned on when you're trying to charge it.
The charger is a charger, not an external power supply for the phone. Some phones can draw enough current to run the phone and charge the battery at the same time, but most can't. Turn the phone off, charge the phone, then turn the phone on.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.