Seasonic S12III-650 Guide De L'utilisateur page 13

b. DO NOT use excessive force to attach the connectors; the connectors are "keyed" so they can
only fit one way.
c. Make sure that the connectors lock in tightly and securely.
4. Close the computer case according to the manufacturer's instructions.
5. Plug in the AC power cord provided in the box and switch the AC On/Off switch on the back panel
of the power supply to the "I" (On) position.
6. You are now ready to start your computer powered by Seasonic.
V. Troubleshooting
If the power supply unit fails to function properly, please go through the below checklist.
1. Check to make sure the AC power cord is properly connected to the AC source and the power
supply unit.
2. Check to make sure the AC source is On.
3. Check to make sure the AC On/Off switch on the back panel of the power supply unit in the "I"
(On) position.
4. Check and secure all mainboard and peripheral connectors.
5. The AC on/off switch on the back of the power supply unit can be toggled between "I" and "O" a
few times with a 0.5 second delay in between to make sure the power supply unit is reset.
7