Patent ID: 8570182

Claim:
A voltage test system for a motherboard, the voltage test system comprising: a first comparator comprising an inverting terminal to receive a first predetermined voltage, a non-inverting terminal connected to a first voltage terminal of the motherboard to receive a first voltage, and an output terminal, wherein the first comparator compares the first predetermined voltage with the first voltage, and outputs a first comparison signal; a second comparator comprising a non-inverting terminal to receive a second predetermined voltage, an inverting terminal connected to the first voltage terminal to receive the first voltage, and an output terminal, wherein the second comparator compares the second predetermined voltage with the first voltage, and outputs a second comparison signal; a first OR gate comprising a first input terminal connected to the output terminal of the first comparator to receive the first comparison signal, a second input terminal connected to the output terminal of the second comparator to receive the second comparison signal, and an output terminal; and an indication device connected to the output terminal of the first OR gate; wherein when the first voltage is not within a range between the first and second predetermined voltages, the first OR gate outputs a first control signal to start the indication device to denote that the first voltage is abnormal.