... 24 pin power supply connector to mini tester;Check LED light if ON or OFF (+5V, +12V,+3.3V,-5V,-12V,+5VBS,PG ... /24 pin (ATX-connector)Voltage test: +12V,-12V,+5V-5V,+3.3V,5V Stand by(SB) 12V, power Good (PG)Connectors: Floppy, HDD, CDROM ... , SATA, 4 pin(p4),8 pin(Dual-CPU). 6 pin (PCI-Express) LED power supply ...