A power generating apparatus includes a power supply, a first sub-end circuit, a second sub-end circuit and an integrated signal generator. The first and second sub-end circuits respectively generate first and second sub-end standby power. The first sub-end circuit receives a first integrated control signal. The second sub-end circuit receives a second integrated control signal. The first sub-end circuit cuts off the first sub-end standby power according to the first integrated control signal and turns on the first sub-end standby power again after a first delay time. The second sub-end circuit cuts off the second sub-end standby power according to the second integrated control signal, and turns on the second sub-end standby power again after a second delay time. The integrated signal generator generates the first and second integrated control signals.