Turn-onyour power supply
Plug-inyour 24 pin power supply connector to mini tester
CheckLED light it ON or OFF
Plugthe HDD con, check +12V, +5V
RemoveHDD, Plug p4(p6/p8)con, check +12V
Removep4(p6/p8)con, plug FLOPPY con, check +12V, +5V
RemoveFloppy con, plug SATA con, check +12V, +5V, +3.3V
Donot plug wrong position when you use P4 connector