Why does my Samsung Galaxy Note 5 make the charging noise when its not plugged in?

[AC Question]

My Galaxy Note 5 has been making the two tone charging noise (like it's being plugged in to charge) even when it's not plugged in...idk why it's doing this and it just stared recently. Please someone help me figure out what's wrong with it.

 

[Rukbat]

That could be an intermittent short in the charging port, caused by some dirt. Try blowing the port out with canned air (never use a compressor for that)..