Power Supply DOA

[sgs]

Just started first PC build. Screwed in Antec 550 TruePower to case, connected
case fan to standard 4 pin peripheral outlet on psu (not fan only outlet),
plugged in the psu and turned it on (black switch from 0 to 1). I noticed that
the case fan is not running. Then I noticed that neither of the 2 fans built
into the psu are running.

Does this automatically mean that the psu is DOA? Is it possible that simply
screwing the psu into the case has created a short. Does the motherboard need
to be connected to the psu for the psu's internal fans to be running? What is
the easiest way to test if the psu is DOA?

 

[Scero]

Nothing will run until you wire up your motherboard and the case's power switch. By switching the switch on the PSU itself you're simply turning on the master power, but not activating the PSU.

Wire up your motherboard and your case switches (power, reset, etc) and then try turning it on using the power switch on the case. Everything should fire up at that point.