The below code

'-------------------------
Private Sub Worksheet_Change(ByVal Target As Range)
Dim c As Range
On Error Resume Next
For Each c In Range("D2:G5")
If Not Application.Intersect(Target, c.Precedents) Is Nothing Then
Interaction.Beep
End If
Next c
On Error GoTo 0
End Sub
'----------------------


sound on each minute change of my system clock. You see, cells
A1 and B1 displays the system clock hour and minute values. And the watching
cells (Range D2:G5) look to the values displayed in A1 and
B1. Then the main macro is executed in minute intervals to let A1 and
B1 refresh their displays. Now although no "display" change is valid in the
watched cells the sound alarm beeps in minute intervals too. Maybe my other
suggestion may prevent that. I hope I didn't confuse you...
Hope we can solve this problem.
Regards
J_J