How to check or test the power supply unit(PSU)?


You need to do the following test to make sure that the power supply can actually turn on:

  • Take off the side panel of your computer case to get to the parts inside.
  • Disconnect your computer from the power network in every way.
  • Disconnect the motherboard, hard drives, video card, and any other computer parts from the power supply.
  • Close the contacts with a paper clip that can act as a jumper. It needs to be bent in the shape of a U.
  • Find the largest group of wires from the power supply and have a 20- or 24-pin connector.
20-24 pin
20-24 pin
  • On the connector, determine the two contacts, the closure of which for the power supply unit is a signal to Find the two contacts on the connector that, when the power supply unit closes them, tells the motherboard to connect. These contacts are very easy to find. They can be found by the numbers 15 and 16, or by the green and black wires from the power supply unit that are next to each other. Note that there may be more than one black wire on the connector, but there is usually only one green wire.
  • Put the paper clip into the detected contacts to make it look like the power supply is connected to the motherboard. Make sure the paper clip is firmly in place and press down on both contacts. If this is the case, take the paper clip out (since electricity can go through it) and turn on the computer’s power supply.
check power supply voltage
Check power supply voltage
  • If you did everything right, the power supply cooler should start working as soon as you plug it in. It means there’s nothing wrong with turning on your computer’s power.

Read the full article here.

Watch the video to understand more.

How To Test A Power Supply Unit (PSU) With A Digital Multimeter | Advanced Troubleshooting

Q&A

How do I check if my power supply is OK?

PC Tip: Testing a Power Supply with The Paper Clip Test

How do I know if my PC has a power supply problem?

Symptoms of a failing computer power supply

  1. Random computer crashes.
  2. Random blue screen crashes.
  3. Extra noise coming from the PC case.
  4. Recurring failure of PC components.
  5. PC won’t start but your case fans spin.

How much power does a gaming PC use?

A gaming computer requires somewhere between 300 – 500 Watts to operate. This translates to up to 1400 kWh annually and is six times higher than a laptop’s power usage. However, these figures vary, depending on the gaming PC features, such as the installed hardware and software and usage frequency.

How do you check a computer power supply without a motherboard?

How To / Turn ON PC Power Supply WithOut MotherBoard

How do I check my PC power supply wattage?

Look at the exposed faces of the power supply unit for a sticker or label that describes the unit’s electrical capacities. This label is required to be placed on all ATX form factor computer power supplies. It will designate how many amps are available for each voltage type and give a “watts max” designation.

How do I test a computer power supply with a multimeter?

Plug the PSU into an outlet and flip the switch on the back. You should hear a fan. Test every pin on the 24-pin motherboard power connector as indicated in this article. Record the voltage and confirm within accepted tolerances.

How do you tell if your motherboard is fried?

Smelling smoke or seeing charred circuitry are obvious signs, but also examine the capacitors, which are cylindrical in shape and placed in various locations on the board. Their job is to filter the electricity going to various components on the board, and power surges or overheating can damage them.

Is a 450W PSU good for gaming?

Gaming workloads don’t exhibit the same level of stress and load as FurMark + Prime95 running simultaneously would. For something like an R5 and GTX 1060 or RX 570, 450W is plenty for these gaming configurations. You can get far on a 450W supply, assuming it’s decent.

How do I manually turn on my power supply?

As most of you probably know, you cannot simply plug in a PSU to the wall and turn it on. The PSU needs a connection to the motherboard to be told to turn on. When you press the power button on your case, it jumps the green wire to a ground, telling the PSU to turn on.

How can I check my power supply without a case open?

What PSU Do I Have? [Simple Guide]

How do I check my power supply specs without opening the case?

Distinguished. No, not unless you can read the label information from outside the case, and I don’t think that’s possible. Unlike the motherboard or processor, the PSU isn’t intelligent, so you can’t run software that will interrogate it and find out what it is. You have to open the case and read the label.

Andy Avery

I really enjoy helping people with their tech problems to make life easier, ​and that’s what I’ve been doing professionally for the past decade.

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