To “paperclip test” a PC, you essentially use a bent paperclip to bridge the connection between the green and black wires on the power supply unit’s (PSU) 24-pin connector, effectively “tricking” it into turning on, allowing you to check if the PSU is functioning by seeing if the fan spins when you plug it in; this is a basic way to diagnose if your PC isn’t powering on due to a faulty PSU. How to perform a paperclip test: Turn off your PC and unplug it: Ensure your computer is completely off and disconnected from the power outlet. Open the computer case: Access the power supply unit inside your PC. Locate the 24-pin connector: Find the large cable connecting the PSU to the motherboard, typically labeled as the “24-pin” connector. Identify the correct pins: On this connector, locate the green wire and a nearby black wire (usually the fourth pin down from the right on the green wire). Bend a paperclip: Straighten a paperclip and bend it into a small “U” shape so it can reach both the green and black pins. Connect the paperclip: Carefully insert the ends of the bent paperclip into the green and black pins on the connector, bridging the connection between them. Plug in and power on: Plug the power supply back into the wall outlet and turn the power switch on. Check for fan activity: If the PSU is working properly, the fan on the power supply should start spinning. Important points to remember: Safety first: Always ensure your computer is unplugged before working inside it. Correct pin identification: Make sure you are connecting the paperclip to the correct green and black wires. Do not force: If you encounter resistance while inserting the paperclip, stop and double-check that you are on the correct pins. What does a failed paperclip test mean? If the fan does not spin when you connect the paperclip, it indicates that the power supply unit is likely faulty and may need to be replaced. Answer from HonoredWhale on reddit.com
🌐
Reddit
reddit.com › r/msi_gaming › psu passed paperclip test, still no boot
r/MSI_Gaming on Reddit: Psu passed paperclip test, still no boot
January 18, 2025 -

Psu functionality questioning… please help

PSU functionality questioning. Help me please

Alright if your reading this please read the whole thing im sorry for the long text

So there was a night where i wanted to power on my pc… nothing no fans no mobo post lights just nothing. I assumed it may go away tomorrow and just went to bed. Once in bed i heard a buzz coming from my pc and my mouse randomly illuminated.

❗️Also before this my pc randomly restarted about once a week and sometimes when i plug in the back of the pc cable and its not fully seated it arced and zapped even when the switch was off.❗️i asked chatgpt alot of questions along the way and it told me to NOT try powering the pc on again so i didnt although i wasnt sure if maybe the power cable just wasnt connected properly or maybe the power switch was still flipped off. But chatgpt said to not take the risk and take it out. And i assumed there is definetely something at fault seen the symptoms i described

so this lead me to thinking it was a psu issue. Basically very clearly a psu thing right… even though i wasnt sure if maybe it just wasnt plugged in right or something. But once again chatgpt told me to not troubleshoot by plugging in the power cable again

So i made a big leap and opened up the pc took out the psu and ran the paperclip test. Boom the fan span to life. My heart sank. Idk what to do z span to life. My heart sank. Idk what to do now.

But i read in google that even if the psu passes the paperclip test that still doesnt indicate that the pc is fully functional. But i dont have another spare psu to plug into my rig to test if it really is the psu.

So now im kind of lost… and kinda regret not checking if the power cable was secured and the button was set to on. But i think these mistakes are still very unlikely to happen to me as im very alert.

Please help a fella out I appreciate the people who reach out to help so much

Thank you

🌐
SilverStone
silverstonetek.com › upload › downloads › QA › PSU › PSU-Paper Clip-EN.pdf pdf
How to Jump Start your power supply (Paper clip test)
How to Jump Start your power supply (Paper clip test) · 1.For your safety, please turn off the power supply first, then set the I/O switch on the back of
🌐
Reddit
reddit.com › r/pchelp › did the good ole paper clip test and it didn’t turn on what to do next?
r/pchelp on Reddit: Did the good ole paper clip test and it didn’t turn on what to do next?
January 5, 2024 - Lol not sure, didn't actually read too much about other comments, just saw a few about the paper clip test & watching the video looked like the PSU switch was off to me. Simple enough of a mistake, I'm sure we've all made it before... But yeah, OP - hit the switch on the back of your PC where the power cord plugs in. Then boot your computer. ... And why the paperclip tests at all?
🌐
Tom's Hardware Forum
forums.tomshardware.com › home › power supplies
[SOLVED] - Paper clip test? | Tom's Hardware Forum
June 28, 2021 - So you should use an ATX power tester, the tester will put some load on the PSU so it will run without a motherboard, even if the fans don't spin. Click to expand... Yeah, hadn't thought of that. I'll add that Molex fans are probably better for paperclip test.
🌐
Reddit
reddit.com › r/computerhelp › how do i do a paper clip test on this pc?
r/computerhelp on Reddit: How do I do a paper clip test on this PC?
January 27, 2025 - Identify the correct pins: On this ... on the green wire). Bend a paperclip: Straighten a paperclip and bend it into a small “U” shape so it can reach both the green and black pins....
🌐
Corsair
help.corsair.com › hc › en-us › articles › 360025085372-PSU-How-to-test-a-PSU-Power-Supply-Unit
PSU: How to test a PSU (Power Supply Unit) – Corsair
If your system is having issues turning on, you can check if your power supply unit (PSU) is functioning properly by performing a test.You will need a paper clip or a PSU jumper to perform this tes...
🌐
Chad Callihan
callihandata.com › 2021 › 07 › 25 › testing-a-power-supply-with-a-paper-clip
Testing a Power Supply with a Paper Clip – Chad Callihan
July 25, 2021 - I'm going to change things up a bit today with a blog post that isn't SQL related. Instead, it is about an interesting troubleshooting experience I feel like sharing. My wife walked in the other night saying she was working on her PC, had walked away, and when she returned she noticed her PC was…
🌐
Reddit
reddit.com › r/buildapc › psu paperclip test failed?
r/buildapc on Reddit: PSU paperclip test failed?
February 15, 2023 -

Build: i3 12100f Gigabyte B660m ds3h ddr4 Inno3d gtx 1660 super Kingston fury beast 2x8gb Kingston NV2 NVMe M.2 1Tb Asus Tuf 650w bronze

Built everything tried turning it on and nothing happened, so i tried the paperclip test on the psu and all it does is one spin and then stop. Did it fail the test? I dont have another pc/psu to test on so i dont know

Find elsewhere
🌐
Spiceworks
community.spiceworks.com › hardware & infrastructure
Extremely Weird Motherboard/PSU issue - Hardware & Infrastructure - Spiceworks Community
June 18, 2017 - For about a week or so now, I’ve noticed that when I try to power on my personal desktop (custom gaming desktop) the internal lights go on and the fans start to spin for about a tenth of a second and then shut off. I did some troubleshooting and discovered if you test the PSU with a paper clip (the old green and black wire trick) and plug it back into the motherboard it boots up properly again.
🌐
Eight Forums
eightforums.com › windows 8 forums › performance & maintenance
PC Won't Power On - PSU Passed Paperclip Test | Windows 8 Help Forums
July 2, 2015 - I started a warranty return w/ ... try the paperclip test. I bridged the connector and got the fan on the PSU to spin and also a hard drive to spin. They're telling me that means the PSU works fine, but I'm not sold - I've seen elsewhere that sometimes if they're fried they can power small things but not an entire system. I've started a warranty return w/ MSI but I'm concerned ...
🌐
AVADirect
avadirect.com › blog › how-to-test-basic-psu-functionality-jumper-paperclip-test
How to test PSU functionality in a custom computer %%sep%% %%sitename%%
August 23, 2022 - If you do not have the jumper tool. Please find a standard size paperclip and unfold it into a long piece. A piece of wire the same thickness will work as well. Power the PC off and ensure the main power switch on the back of the PSU is flipped ...
🌐
Tom's Hardware Forum
forums.tomshardware.com › home › systems
[SOLVED] - PC won't power and but passed PSU paperclip test... what now? | Tom's Hardware Forum
May 4, 2022 - Start with a good PSU, first. ... an expensive paperweight. 2| Paperclip tests are flawed since you're advised to induce a load on one end of the PSU to get it to start, that test does not tell you how many watts the PSU can effectively output if connected to a full build.
🌐
9meters
9meters.com › technology › pc › the-power-supply-paperclip-test
The Power Supply Paperclip Test - 9meters
But the paperclip test is still a good ‘first step’ to rule out several issues if your computer isn’t turning on. The good news is that there’s a quick and easy test, called the ‘Paperclip Test’, which can check to see if ATX PSUs will at least power on.
Published   September 16, 2024
🌐
Puget Systems
pugetsystems.com › home › support articles › power supply isolated test
Power Supply Isolated Test | Puget Systems Puget Systems
August 31, 2023 - With the clip oriented on the left ... right, identify one of the 24 pins as an empty hole, start from this opening and skip two pins, then insert one end of the paperclip into that pin, then the other end into the next pin down...
🌐
MSI USA
us.msi.com › support › technical_details › MB_SPEC_PSU_Jack
How to check power supply specification?
Learn how to check power supply specifications. Discover the different power connectors for motherboards, CPUs, display cards, SATA disks, and chassis fans.
🌐
Freshdesk
bobteam.freshdesk.com › support › solutions › articles › 1000015319-is-my-power-supply-dead-the-paperclip-test
Is my power supply dead?: The Paperclip Test : Antec America support
July 6, 2020 - If your unit is not giving any signs of powering on you can test it using the Paperclip test. ... 3. On the 20+4 Pin connector locate the green wire** going into pin 16 (see diagram below for pin numbering) 4. Insert one end of the paperclip ...
🌐
Wikihow
wikihow.com › computers and electronics › maintenance and repair › how to check a power supply: psu tester, paperclip, & more
How to Check a Power Supply: PSU Tester, Paperclip, & More
February 19, 2026 - Fortunately, it's easy to check your computer's power supply using a power supply tester, which you can get from any store that sells computer parts. If you can't find a PSU tester, you can check to see if the power supply is completely dead by doing a quick paperclip test or by measuring the power supply's voltage using a multimeter.
🌐
Reddit
reddit.com › r/buildapc › psu passes paper clip test when it is connected to nothing, but fails with sata/cpu/pcie cables are connected
r/buildapc on Reddit: PSU passes paper clip test when it is connected to nothing, but fails with sata/cpu/pcie cables are connected
July 6, 2020 -

I'm building my new computer and when I thought I was done and turned it on, the fans spun for a split second then stopped. (The rgb ram stayed lit if that's important) so I tried the paper clip test by just unplugging the 24 pin cable from the motherboard and putting the paperclip into the correct pins. The same thing as before happened, fans spin for half second then stop. So I tried unplugging the psu from everything, then testing them 1 by 1. With nothing connected to the psu ( unplugged pcie cable from gpu, unplugged sata connector from psu, unplugged CPU cable from motherboard) the psu fan turned on and stayed on. With any 1 thing connected, (whether it be a sata connection, the gpu plugged in, the motherboard CPU cable plugged in) it didnt work (psu fan spins for half second then stops) i tried each sata connection individually (my kraken x52, my ssd, my corsair rgb fan hub) and each one made the psu fan spin for a half second then stop. Ideas of what's going on? Should I go for a new psu?