... check in specialized trade.The methods of operationa. Plug power supply 24PIN and P4, P6 or P8 into ... the corresponding jack of the power test suite.b. Power on the supply of power, will hear "DuDu" ring ... voltage value or PG flicker too, then the power is failed.SpecificationVoltage source : 20/24pin (ATX- ... ,+5V,-5V,+3.3V,5V Stand by (SB) 12V power Good (PG)Connectors : Floppy, HDD, CDROM, SATA, ...