To determine if \( m = 4 \) is a solution to the equation
\[ m - 4 = 0, \]
we can substitute \( m \) with 4:
\[ 4 - 4 = 0. \]
Simplifying this gives:
\[ 0 = 0. \]
Since this is true, \( m = 4 \) is indeed a solution to the equation.
The answer is yes.