Richard
If all workbooks and worksheets, perhaps this fix...............
http://support.microsoft.com/default.aspx?kbid=833258
The fill color, the fill pattern, or the line color of a WordArt or
AutoShape object in an Office document does not change
As directed, change the High Contrast setting in Windows OS
Gord Dibben MS Excel MVP
>New latitde d620 using excel, when I try to color a cell by selecting the
>cell and clicking on the fill icon, nothing happens. What setting do i need
>to change