Power supplies have safety functions to protect against hazards and equipment damage. Should your power supply fail to function properly, please verify the following:
1. Ensure that the I/O switch on the power supply is switched to "I".
2. Make sure all the appropriate power connectors are properly connected to the motherboard and peripherals.
3. If the system still does not turn on, please turn off the power supply through the ON/OFF (I/O) switch a few seconds to reset the protection circuits, then switch to the "I" status again.