The lights on the control board and clock does not work, the oven works and beeps when you set it, but there is not display. does the control board need to be replaced.
Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=W30400P
Yes the most common repair for this is to replace the control board.
Another possible fix is the below but you need some electronics experience to do this.
http://****************.com/wp/2009/01/28/cheap-fix-for-a-dim-display-on-an-oven-control-panel/