Step 1: After the ATX power supply is powered on, the ATX power supply starts to output the standby working voltage (SB5V), and then the real-time clock starts to work, sending the 32.768KHz real-time clock signal to the CMOS circuit and the power-on circuit.
Step 2: Press the power switch to start the computer. At the moment of pressing the power switch, the power switch sends a power-on trigger signal to the NQ chip or I\/O chip to trigger the power-on circuit to work. At this time, the 14th pin of the power interface becomes low and the ATX power supply starts to work.
Step 3: After the ATX power supply starts working. Each pin of the power interface begins to output the corresponding working voltage to the main board's large system and each hardware.
Step 4: After all the power supply output is correct 100ms-500ms, the ATX power supply will send 3V-5V PG signal to the motherboard from the 8th pin, the secondary signal is provided to the CPU.BQ and NQ, wherein the PG signal entering NQ acts on the internal reset module. The PG signal is connected to the RST# end of the system clock chip via NQ as the RST# signal (reset signal).
Step 5: After having the RST# signal (reset signal), the clock chip starts to work, and sends a clock signal of various frequencies to the motherboard, and the reset module inside the clock signal NQ starts to work.
Step 6: At this time, the hardware devices of the mainboard such as BQ and CPU begin to reset, and after the reset, the CPU begins to work, so that the hard boot of the computer is completed.