Check for non-identical values in a column

Greetings all,

I am in need of a formula/function to look at a column array and identify any cells that have different values. The cell values will vary, but need to be the same. For example A1:A10 should each have a value of 2, but A5 has a value of 3, so it is flagged somehow (True/False maybe?). It would also need to ignore blank cells.

Any ideas?

Much appreciated,

Ken