I have a Dell Dimension 4100 and I am pretty sure that the power supply is shot. I was wondering if there are any tests that I can do to make sure that it is the power supply and not something else. I am sure that there is nothing wrong with the power cord. When I plug in the cord and push the power button nothing happens and nothing lights up. I was also wondering why there are four cords going to each drive. I know it needs a positive and negative and posibly a ground but what is the last one for. What does each cord do? Is it possible to replace it with a generic PSU becuase i heard that only dell ones will work with a dell computer. Thanks -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .