How does psu tester work

Connect the main motherboard wire bundle 20 or 24 pin to the tester and then plug the PSU into a power source. When you turn on the PSU the tester should quickly light up and show you which voltage tests are within specs.

From this point on you should only connect one other line at a time. Plug-in, read, unplug The pics below will show you what to expect on a good test; I had to take the pics in low light so that you could easily see the test results. When you first fire up the PSU the tester should greet you with a quick beep which means that everything is ok. If you don't hear a beep, then something did not check out right. The Molex Connector located along the bottom edge of the tester should give results similar to the Floppy connector.

The SATA power connector is located along the top edge of both testers. Now what? If it was a different LED indicator or rating then make sure that you test all connectors along that string if applicable to determine if it is just a problem with that particular connector or the entire line.

If it is a problem with the entire line then it that can be indicative of a failing, or already failed, PSU. They can generate heat and are not intended to be plugged in for an extended duration.

They are intended to be used as a quick means to evaluate a PSU's health and reliability. Advanced Search. Shop by Brand. Attach the Power Supply Tester to the end of the pin motherboard connector. There is a notch on the Tester that fits directly into the notch on the pin connector. Did this answer your question? Thanks for the feedback There was a problem submitting your feedback. Please try again later. Yes No. Upload file. There are several reasons a computer won't start other than a malfunctioning power supply.

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Tell us why! More from Lifewire. Molex 4-pin Peripheral Power Connector Pinout.