F5F Stay Refreshed Hardware Desktop Noise coming from the power supply unit

Noise coming from the power supply unit

Noise coming from the power supply unit

V
VeryButter
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67
05-22-2016, 06:38 PM
#1
I noticed your Corsair CX PSU making a knocking sound recently. It’s frustrating when something like that happens. You could try DIY fixes first, but since the PSU is nearly ten years old, it might be safer to replace it.
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V
VeryButter
05-22-2016, 06:38 PM #1

I noticed your Corsair CX PSU making a knocking sound recently. It’s frustrating when something like that happens. You could try DIY fixes first, but since the PSU is nearly ten years old, it might be safer to replace it.

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K
Krhome
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62
05-30-2016, 10:50 AM
#2
Are you certain it's the power supply unit? It seems like a fan is hitting a cable or a dead bearing on the fan.
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K
Krhome
05-30-2016, 10:50 AM #2

Are you certain it's the power supply unit? It seems like a fan is hitting a cable or a dead bearing on the fan.

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C
ckoneal16
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30
06-02-2016, 05:07 PM
#3
It originates from the PSU. I disassembled the PC to locate the sound source, which was indeed the PSU. After replacing it, positioning it differently didn’t affect the issue.
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C
ckoneal16
06-02-2016, 05:07 PM #3

It originates from the PSU. I disassembled the PC to locate the sound source, which was indeed the PSU. After replacing it, positioning it differently didn’t affect the issue.

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H
huityweb
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157
06-02-2016, 06:56 PM
#4
Consider removing the PSU cover with care. Allow it to rest briefly before handling it. Ensure the caps have fully discharged. Inspect the fan cable for contact with the blades. If no contact is found, replace the fan.
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H
huityweb
06-02-2016, 06:56 PM #4

Consider removing the PSU cover with care. Allow it to rest briefly before handling it. Ensure the caps have fully discharged. Inspect the fan cable for contact with the blades. If no contact is found, replace the fan.

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T
TheFleche
Junior Member
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13
06-13-2016, 10:08 AM
#5
It's understandable to feel concerned about the safety of PSU capacitors. Many people wonder if companies should clearly warn users about potential dangers. A simple "do not open" label without any context might not be enough to prevent accidents.
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T
TheFleche
06-13-2016, 10:08 AM #5

It's understandable to feel concerned about the safety of PSU capacitors. Many people wonder if companies should clearly warn users about potential dangers. A simple "do not open" label without any context might not be enough to prevent accidents.

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C
CaptainFrix
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213
06-16-2016, 02:08 PM
#6
I'm unable to play the video, it seems to be malfunctioning. Please avoid touching anything except the case and possibly the fan. Unplug it from the mains; the PSU should discharge within 10-20 seconds. Internal components manage high-voltage capacitor discharge, but occasionally this fails, risking injury. Be careful with the heatsinks inside—they might still retain charge. The fan and exterior are safe. Most power supplies include a plastic segment between the PSU metal casing and the fan, directing airflow toward hotter areas. Occasionally the plastic can warp or break, causing contact with fan blades and producing noise. If you move the fan and silence the sound, the issue likely lies elsewhere. If it persists, the fan may be defective—possibly due to worn bearings or poor lubrication. A straightforward fix is replacing the fan, but ensure you follow its specifications regarding speed, airflow, and pressure.
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C
CaptainFrix
06-16-2016, 02:08 PM #6

I'm unable to play the video, it seems to be malfunctioning. Please avoid touching anything except the case and possibly the fan. Unplug it from the mains; the PSU should discharge within 10-20 seconds. Internal components manage high-voltage capacitor discharge, but occasionally this fails, risking injury. Be careful with the heatsinks inside—they might still retain charge. The fan and exterior are safe. Most power supplies include a plastic segment between the PSU metal casing and the fan, directing airflow toward hotter areas. Occasionally the plastic can warp or break, causing contact with fan blades and producing noise. If you move the fan and silence the sound, the issue likely lies elsewhere. If it persists, the fan may be defective—possibly due to worn bearings or poor lubrication. A straightforward fix is replacing the fan, but ensure you follow its specifications regarding speed, airflow, and pressure.

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T
Tobuscus553
Junior Member
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28
06-16-2016, 09:03 PM
#7
I disassembled it a bit and the fan isn’t making contact with anything. The most probable reason seems to be that the fan is outdated and damaged. Since I’m not very experienced swapping components, I think it’s best to replace the power supply unit instead. Thanks!
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T
Tobuscus553
06-16-2016, 09:03 PM #7

I disassembled it a bit and the fan isn’t making contact with anything. The most probable reason seems to be that the fan is outdated and damaged. Since I’m not very experienced swapping components, I think it’s best to replace the power supply unit instead. Thanks!

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