If the motherboard can't power up properly outside the case with minimal components connected to it, then either the board or PSU have a fault. Test outside the case. This removes your PC case as a culprit. Try to power up with nothing but the CPU hooked up (have the cooler still connected). See if you can get the CPU fan to spin (indicating some power is going through). You can take the above test a step further and try to power up with nothing at all connected to the motherboard. Just the 24-pin power cable and a case fan hooked to a case/system fan header are all you need. To power the board, use a screwdriver. Locate the two power switch pins (+ and -) and touch them together with the screwdriver. This tells your board to switch on. This test eliminates the front case connector. Bad PSUs can pass the paperclip test. The true test that eliminates a PSU from the equation is a replacement or trying that same PSU in another known working machine. Only these 2 can truly rule out a PSU. Answer from SingularityRS on reddit.com
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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?

Discussions

PC won't power and but passed PSU paperclip test... what now?
Hi all, Today I set up my computer after moving into a new place and it won't turn on at all. The mouse and internal PC light which is normally active don't light up either. I tried the PSU paperclip test and the supply actually did run fine. Does this mean that something major, like the... More on forums.tomshardware.com
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0
May 4, 2022
PSU Passes Paperclip Test But Still Won't Start? - PCPartPicker
A few days ago, it went into sleep mode after not being in use for a while, but this time it wouldn't turn on. I tried turning the PSU off and on but the PC still wouldn't start. I took the PSU out and used the self test kit that was included, which basically works like the paperclip test. More on pcpartpicker.com
🌐 pcpartpicker.com
Psu passed paperclip test, still no boot
Intermittently starting on its own would lead me to think you had a motherboard issue, or that your front panel power connector developed a short (could honestly also be a bad ground affecting a PCI-E card as well), but as I’ve pointed out to others, bad PSUs CAN pass the paperclip test as all that tests is the PSU turning on, not the actual output voltage which is typically what you need to know… More on reddit.com
🌐 r/MSI_Gaming
23
9
January 18, 2025
PSU pass the paper clip test, computer still doesnt turn on
I disconnected all the cables from the motherboard to test the PSU. It didn't turn on. I found online that if you use a paperclip to connect the green wire's connector of the 24 pin connector to one of black wire's connectors, you can turn on your power supply without having it connected to ... More on forums.tomshardware.com
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0
December 24, 2012
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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...
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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 - Expect to pay a 15% return fee in case a new... ... 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.
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NZXT
support.nzxt.com › hc › en-us › articles › 1260802863490-Testing-your-Power-Supply-Unit-Paperclip-Test
Testing your Power Supply Unit (Paperclip Test) – NZXT Support Center
March 2, 2026 - NZXT PSU Cable Compatibility · ... known as a Jumper Test or Paperclip Test involves jumping the Power On and Ground pins on the Power Supply's 24-pin ATX power cable....
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Puget Systems
pugetsystems.com › home › support articles › power supply isolated test
Power Supply Isolated Test | Puget Systems Puget Systems
August 31, 2023 - This guide provides step-by-step instructions on performing PC Power Supply Troubleshooting using the paperclip test to identify a potentially faulty power supply.
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Gadget Mates
gadgetmates.com › the-power-supply-paperclip-test
The Power Supply Paperclip Test - 9meters
September 16, 2024 - 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.
Find elsewhere
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PCPartPicker
pcpartpicker.com › forums › topic › 233165-psu-passes-paperclip-test-but-still-wont-start
PSU Passes Paperclip Test But Still Won't Start? - PCPartPicker
Hey guys, just an update on the issue. It was in fact the motherboard failing. The PSU is just fine and by replacing the motherboard, the PC was able to turn on and get on to Windows with everything just the way I left it.
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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 none of these kick on, then that means the PSU is at fault. If one or more do kick on, it is still possible that the PSU is bad, however there is a possibility that another component could have failed.
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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

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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
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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 - Insert a paperclip or a piece of wire between a 12V pin (1-3) and a ground pin (4-6). Power on the supply to test the connection. If the supply starts (fan spins, etc.), it is working. Never short 12V to another 12V pin or ground to ground.
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Reddit
reddit.com › r/pcbuildhelp › new psu passes paper clip test, but won’t power pc.
r/PcBuildHelp on Reddit: New PSU passes paper clip test, but won’t power PC.
April 19, 2024 -

So I’ve been in the process of upgrading my PC a few parts at a time. At this point, everything except for the GPU is brand new. Yesterday I got this PSU - “Thermaltake GF1 (2024) Fully Modular ATX 850W Power Supply - 80 PLUS Gold - Ultra Quiet - Zero RPM, PS-TPD-0850FNFAGU-P” - However it doesn’t power the PC at all when I hook it up. I thought for sure it was DOA because the old power supply worked fine when I tried putting it back in. I tried the paper clip test, however, and the new PSU started up fine. I have an Aorus B650 Elite AX V2 mobo. I have tried multiple outlets, and at this point I’ve checked all the connections several times over. I’m a little lost at this point and any help is appreciated.

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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 - Don’t be a dummy like me and do the paperclip test with a non conductive metal clip and blame your PSU ... PSU passes paper clip test when it is connected to nothing, but fails with sata/cpu/pcie cables are connected
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Tom's Hardware Forum
forums.tomshardware.com › home › power supplies
[SOLVED] - PSU passes paper clip test but does not turned on plugged into pc. | Tom's Hardware Forum
March 22, 2020 - Make sure you are plugging in the ... into the CPU_FAN header and not in any other fan header. ... the paperclip "test" can only tell you that the PSU can power itself, it DOES NOT clear the unit as working....
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Reddit
reddit.com › r › buildapc › comments › 3jvcsw › troubleshooting_power_supply_passes_paperclip
r/buildapc - [Troubleshooting] Power supply passes paperclip test but won't power motherboard
May 3, 2020 -

Troubleshooting Help:

What is your parts list? Consider formatting your parts list.

  • Processor: i5

  • Motherboard: FMB-0901

  • Original Power Supply: DPS-320KB-1 A REV

  • New Power Supply: EVGA 500W 80 Plus

Describe your problem. List any error messages and symptoms. Be descriptive.

Alright, so I bought an HP Z200 off a friend in an IT department, they were getting new computers and selling off all the old ones. I've been stuck on a MBP for 5 years and this is my first time doing any PC building. Bought a new sound card, hard drive and graphics card (ASUS Geforce GTX 750 Ti) so that I can play Goat Simulator or something like that (light gaming, basically). The graphics card requires a PCI-e power extension, which the existing power supply doesn't have. After asking around, I'm told the best bet is to buy a new power supply. K, fine.

Problem in short: Computer boots up with old power supply no problem. With new power supply nothing happens, but it passes the paperclip test.

List anything you've done in attempt to diagnose or fix the problem.

I've tested the power supply with a paper clip and get the right voltages, but it does nothing when connected to the motherboard.

Post relevant photos of build/parts here.

http://i.imgur.com/0ac66Vi.jpg

Provide any additional details you wish below.

I think I screwed up something basic, but don't know what.