I left my Galaxy 4 charging overnight. In the morning it wouldn't turn on. My battery and charger are good and it wouldn't tur

[kayjones]

I've removed and replaced the battery, had a shop check it (it's OK), tried a new battery, and nothing works. The shop suggested replacing the charging port. Might that help?

 

[webworkings]

You said the charger is good, but did you test the charger on any other devices?

 

[kayjones]

At the battery store, when they checked my battery, they also checked the charger and said it was OK. It won't start even when on the charger, nor with the charger unplugged and just one the good battery.

 

[webworkings]

Then it is probably a hardware issue. That you really cannot fix on your own.