... user, as well as for a quick functional check in specialized trade.The methods of operation Turn-on your ... power supply ;Plug-in your 24 pin power supply connector to mini tester;Check LED light if ON ... 3.3V,-5V,-12V,+5VBS,PG);Plug HDD con, check +12V, +5V;Remove HDD, Plug P4(P6 /P8) ... ) con, Plug FLOPPY con, check +12V, +5V;Remove FLOPPY con, Plug SATA con…, check +12V, +5V,+3.3V; ...