Abstract: A computer is used in a computer. The computer includes a resistor coupled to a motherboard of the computer, a control module, and an output module. The output module is coupled between the resistor and the control module. The control module is configured to control the output module to make a first response when the computer is in a S3/S4 state and control the output module to make a second response when the computer is working at a full speed. The motherboard is configured to output a first voltage to the output module when making the first response and output a second voltage to the output module when making the second response. The first voltage is configured to supply the addition card via the control circuit and the second voltage is configured to supply the addition card via the control circuit.

Abstract: A power control system includes a first comparison unit, a second comparison unit, a switching unit, and a power supply unit. The first comparison unit receives a switch voltage and a first reference voltage, compares the switch voltage with the first reference voltage and outputs a first comparison voltage. The second comparison unit receives the first comparison voltage and a second reference voltage, compares the first comparison voltage with the second reference voltage and outputs a second comparison voltage. The switching unit receives the second comparison voltage and converts a power control voltage to the switch voltage. The power supply unit receives the switch voltage and outputs a working voltage to wake up a motherboard. The power supply unit only wakes up the motherboard when the power supply unit is completely discharged.

Abstract: A computer includes a power button, a south bridge chip, a switch module, a mode setting module and a control module. The power button transmits a power off signal in response to a power off operation. The south bridge chip controls the computer to shutdown in response to the power off signal. The switch module controls whether the power off signal is transmitted to the south bridge chip. The mode setting module provides modes for setting the mode of the computer. The provided modes include a preventing power off mode. The control module controls the switch module to disconnect to prevent the power off signal from transmitting to the south bridge chip on the basis of the power off signal when the mode of the computer is set as the preventing power off mode. The disclosure also provides a method for preventing error shutdown of the computer.

Abstract: A power control system includes a first comparison unit, a second comparison unit, a switching unit, and a power supply unit. The first comparison unit receives a switch voltage and a first reference voltage, compares the switch voltage with the first reference voltage and outputs a first comparison voltage. The second comparison unit receives the first comparison voltage and a second reference voltage, compares the first comparison voltage with the second reference voltage and outputs a second comparison voltage. The switching unit receives the second comparison voltage and converts a power control voltage to the switch voltage. The power supply unit receives the switch voltage and outputs a working voltage to wake up a motherboard. The power supply unit only wakes up the motherboard when the power supply unit is completely discharged.

Abstract: A computer is used in a computer. The computer includes a resistor coupled to a motherboard of the computer, a control module, and an output module. The output module is coupled between the resistor and the control module. The control module is configured to control the output module to make a first response when the computer is in a S3/S4 state and control the output module to make a second response when the computer is working at a full speed. The motherboard is configured to output a first voltage to the output module when making the first response and output a second voltage to the output module when making the second response. The first voltage is configured to supply the addition card via the control circuit and the second voltage is configured to supply the addition card via the control circuit.

Abstract: A power on and off testing device includes a control module, a switch module, an alternating current and direct current converter module, an input module, and a detecting module. The switch module is connected to an alternating current source. The alternating current and direct current converter module is connected to a motherboard of a computer. The input module is connected to the control module to input testing references to the control module. The detecting module is connected between the control module and the motherboard. The detecting module detects a power status of the motherboard and sends the power status to the control module. The control module controls the switch module to be switched on according to the power status after receiving the testing references, thereby controlling the alternating current source to supply power to the motherboard.

Abstract: A computer includes a keyboard, a PCB, a south bridge chip, a BIOS chip, a buffer circuit, and a USB switch. The PCB includes a USB connector connected to the keyboard. The BIOS chip is connected to the south bridge. The USB switch includes a control pin and a first output pin. The BIOS chip sends a dormancy command to the keyboard via the south bridge chip after the computer receives a shut-down signal. The south bridge chip sends a first control signal to the control pin to enable the USB switch to turn on the first output pin after the computer is powered off. The keyboard sends a triggering signal to the USB switch. The first output pin sends the triggering signal to the south bridge chip via the buffer circuit to enable the computer to start up.

Abstract: The present disclosure provides a motherboard testing apparatus and method. The motherboard testing method includes following steps. A motherboard testing apparatus is provided. The testing computer and the testing device are electrically connected to a motherboard. The testing computer runs an operating system based on the motherboard. The testing computer receives an input testing times and sends the input testing times and a running signal to the testing device. The testing device powers off the motherboard, reduces the input testing times by 1 to a current testing times after a period of determined time, and powers on the motherboard after determining that the current testing times is greater than 0.

Abstract: An exemplary discharge test circuit for testing whether there is current on a circuit board includes a comparison module, a switch module, a control module and a display module. The comparison module receives a first direct current (DC) voltage from the circuit board, compares the first DC voltage with a reference voltage, and outputs a switch signal according to a result of the comparison. The switch module receives the switch signal, and output a control signal accordingly. The control module receives the control signal, determines a status of the circuit board according to the control signal, and outputs a display signal corresponding to the status of the circuit board. The display module receives the display signal, and displays whether there is current on the circuit board according to the display signal.

Abstract: A power on and off testing device includes a control module, a switch module, an alternating current and direct current converter module, an input module, and a detecting module. The switch module is connected to an alternating current source. The alternating current and direct current converter module is connected to a motherboard of a computer. The input module is connected to the control module to input testing references to the control module. The detecting module is connected between the control module and the motherboard. The detecting module detects a power status of the motherboard and sends the power status to the control module. The control module controls the switch module to be switched on according to the power status after receiving the testing references, thereby controlling the alternating current source to supply power to the motherboard.

Abstract: A control system includes an input module, a control module, a switch module and a display module. The input module is configured to output test parameters to the control module. The control module is capable of outputting power on and power off control signals according to the test parameters. The switch module is capable of receiving the power on and power off control signals and is configured to output the signals to power a computer motherboard on or off accordingly. The computer motherboard is configured to output feedback signals to the control module after being successfully powered on. The control module displays test results on the display module according to the feedback signals.