you may need a correct load? is it a 1 second tick-tick-tick?
2 events trigger this. underload, and overload. Check ohms readings between your rails to ground. at the motherboard, and at the power supply. if the impedance is too low, or shorted, thats a problem.
If the rail that contains the feedback network goes unloaded, or underloaded, it will cause an overshoot which the power supply will shut down and recycle from gross overvoltage condition. this trigger repeats until the correct load is produced.
Same thing if its shorted, or overloaded. it trips the overload detect sense resistor on the source of the MOSFET. same trigger event occurs, the timing capacitor on the SMPS control IC sets this.
2 events trigger this. underload, and overload. Check ohms readings between your rails to ground. at the motherboard, and at the power supply. if the impedance is too low, or shorted, thats a problem.
If the rail that contains the feedback network goes unloaded, or underloaded, it will cause an overshoot which the power supply will shut down and recycle from gross overvoltage condition. this trigger repeats until the correct load is produced.
Same thing if its shorted, or overloaded. it trips the overload detect sense resistor on the source of the MOSFET. same trigger event occurs, the timing capacitor on the SMPS control IC sets this.