As long as it is getting power there isn't much else related to the PS wiring.  Maybe you loosened the data cable when you plugged in the power. Check to make sure the data cable is fully seated. Check all plugins on that data cable, including the master, slave and where it plugs into the motherboard.  Also make sure you have the data cable plugged in correctly (pin 1 to pin 1).  Most only go in the right way, but it can be forced in the wrong way.  Make sure it's right.

> the wires & connections are a little different from the old one.
>I am not sure it is wired correctly, because my CD-RW does not show up on the computer. It is getting power, but nothing recognises I have a burner.
>Is there a certain sequence I should have connected the things?
>I need the cdrom, cdrw, floppy & hard drive all connected.  Oh & the little fan connects in there too.
>Should I disconnect the cdrom & try just connecting the cdrw to make sure it makes a difference?
>


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