<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> The Power Good signal (power - good) prevents a computer from attempting to operate on improper voltages and damaging itself by alerting it to improper power supply . </P> <P> The ATX specification defines the Power - Good signal as a + 5 - volt (V) signal generated in the power supply when it has passed its internal self - tests and the outputs have stabilized . This normally takes between 0.1 and 0.5 seconds after the power supply is switched on . The signal is then sent to the motherboard, where it is received by the processor timer chip that controls the reset line to the processor . </P>

What is the purpose of the power good signal