When you experience all or most of the strings buzzing when played open, then it is likely the neck is back bowed (there's not enough relief). The strings are buzzing against the first fret. The fix is simple: increase the amount of relief in the neck by loosening the truss rod.
How do I get rid of fret buzz?
If you find the Buzzing is Closer to the Middle of the Neck or Towards the Nut. Inserting a thin shim under the nut can raise the strings enough to eliminate unwelcome contact with the frets. Again, try shimming in small increments; an overly high action makes fretting difficult.
What can cause fret buzz?
Changes in humidity and temperature can commonly cause fret buzz. Fret buzz is a buzzing noise that occurs when the string vibrates against one or more of the frets. Sometimes you can experience fret buzz in the open position, and other times it could be specific strings and/or frets.
Is a little fret buzz normal?
Because of different style preferences, some players are okay with a little fret buzz as long as their action is as low as possible. However, others may find even a little fret buzz distracting and uncomfortable. ... If the pitch doesn't change when playing adjacent frets. If you can hear the buzz through your amp.