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ATX Power Supply Tester CoolMax PS-101 for ATX 20-pin Power Supply TS-PS-ATX20-PS101 Features: 1. Turn-on your power supply. 2. Plug-in your 20 pin power supply connector to mini tester 3. Check LED light it ON or OFF (+5V. +12V. +3.3V. -5V. -12V. +5VBS. PG) - If the power output is working, the LED will light and you will hear a sound - If the power output fails, you won't see the LED light & no sound 4. Plug the HDD power connector to check if it passes or fails 5. Remove HDD power and plug P4 connector to check if it passes or fails! 6. Remove P4 connector and plug the Floppy power connector to check if it passes or fails
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