To get an ATX power supply to turn on without hooking it up to a motherboard you need to short two pins in the motherboard connector, as in this article: http://www.dvhardware.net/articles5.html -- Rich On Tue, Oct 28, 2008 at 11:36 PM, <shopdog at mac.com> wrote: > Doug: > > It's been a couple of weeks, but I need to ask you how you powered the > drives that were sitting outside the chassis. I have a CoolerMaster > RS-450-ACLX power supply, which is normally used in a chassis to power all > system components. It, of course, has power connectors for hard drives. > > I set it up as a stand-alone power supply for two drives that are sitting > outside the G4 chassis. Meaning, it's connected only to a power outlet, and > the two drives. The two drives are connected to the Acard AEC-6280M card > via some IDE ribbon cables. What I don't understand is that when I switch > the power supply on, it doesn't power on. It doesn't make any noise, and > the fan does not start up, and the drives certainly don't get any power. > It's as if it's not turned on. > > Is there another switch that I have to turn, or does it need to be connected > to a motherboard, etc.? > > Thanks for any help you can provide. > > shopdog