G'day..
I Need to know how to test this 4 legged single piece component what a
belive is a (Rectifier diode) gotten out of a computer power supply,
which now i suspect of being bad. No is KBL406G, and it has a + and -
marked on the first and last leg 4 all together.

The diode looks simmilar to the following..
http://www.radioshack.com/images/Pro...6/276-1146.jpg

Does anyone have a good diagram with discription on testing these
component.

Thanks.