Open the computer and disconnect all of the components from the power supply. Follow the cables from the power supply to each component to ensure that everything has been properly disconnected. Test the power supply with a power supply testing unit. These are available online and from computer stores, and are not very expensive. This is typically the largest cable for the power supply.
Plug the power supply back into the outlet and turn it on. Your power supply should turn on automatically and your power supply tester will light up. Some power supply testers require you to turn on the power supply using a switch or button on the tester.
Others will turn on automatically. Check the voltages. If any of the readings are outside that range, than the power supply is bad and needs to be replaced. Test the other connectors. Unplug and turn off the power supply between each test. Test the power supply with a multimeter. Plug the paperclip into the green pin pin 15 and into one of the neighboring black pins.
Plug the power supply back in and turn it on. Find a pinout chart for your power supply. This will let you know which pins provide which voltages. Set your multimeter to the VBDC setting. If your multimeter does not auto-range, set the range to 10V. Connect the negative probe of the multimeter to a ground black pin on the connector. Connect the positive probe to the first pin that you want to test.
Make a note of the voltage displayed. Check the voltages to make sure they fall within the tolerance threshold. If any of the voltages are outside of the tolerance range, then the power supply is defective.
Repeat the process for each of the peripheral connectors. Refer to the specific pinout charts for each connector to see which pins to test. Reassemble your computer. Ensure that all of your devices are properly plugged back in, and that all of the motherboard connectors are properly seated. Once you have finished reassembling the computer, you can try powering it on. If you are still having computer errors, or your computer will not start, move on to other troubleshooting steps. The first place to check will be your motherboard.
Luigi Oppido. The only way to know for sure is to use a power supply tester. You can make some solid guesses based on how your computer is behaving, but there's no way to know for sure without a power supply tester.
Not Helpful 3 Helpful 3. Yes, theoretically, a power supply should still be able to function if only one of the pathways is bad. Until now you have found out how to know what power supply unit you have.
The easiest way to check power supply unit wattage is by looking at the PSU box that came along with the PSU while buying it from the store. Check the specifications section of the PSU. You will notice the max power of the power source. For a pre-built PC, go to the official manufacturer website and find the power source used in your computer from your PC model product page.
Also, you can check the receipt of the bought PSU or, check the label on the PSU by opening the side panel of the computer case. You may want a new power supply as well as an excellent efficiency rating. The ATX power supplies usually have the dimension of mm x 86mm x mm, which is big enough for cooling down quickly.
It would help if you got a power supplying unit that is big enough and will fit inside the case of your PC. You also need to know the tier that your power source belongs to because different power supplies of the same wattage and rating perform differently. That is why I recommend you to check out our latest PSU tier list. There are tons of PSU calculators on the internet. But most of the power supply calculators are inefficient in suggesting the write wattage and certifications.
Unfortunately, checking your power supply isn't as easy as other tasks. You can't check it with an app — instead, you'll need to open your PC's case and look at the power supply directly. For you. World globe An icon of the world globe, indicating different international options. Get the Insider App. Click here to learn more. A leading-edge research firm focused on digital transformation.
Good Subscriber Account active since Shortcuts. If you have a computer that is already assembled, you can determine how big the power supply is by opening the computer case and examining the unit. As shown in the image above, this Chieftec power supply is rated at Watts.
Many power supply manufacturers also use the wattage of the power supply in the model number. All power supplies are required by UL formerly known as Underwriters Laboratories to include a sticker with power ratings on it. If you're unable to locate a sticker on your power supply, the identification may be on the side that is not visible.
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