Is my PSU Acting Up? Weird Hum Every So Often...

  1. Wombo's Avatar
    Posts : 27
    Windows 10
       #1

    Is my PSU Acting Up? Weird Hum Every So Often...


    I was moving my desktop tower and it took a hard fall, but nothing catastrophic. Since yesterday I've been noticing this weird noise Vocaroo | Voice message

    I BELIEVE it is coming from my PSU (EVGA 760w Gold 80) since whenever I tap the case of it, or when I press onto the case of the PSU, the noise dies down. Is there any way to repair this or do I need to purchase a new PSU?
      My Computer

  2. Compumind's Avatar
    Posts : 2,802
    Windows 10 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #2

    Hey Wombo -

    Fall, huh? Or do you want a new PC?

    Disconnect the PSU from the MOBO and open it up. See if any fan blades are biding or broken. Reseat all the cables on the MOBO, as well.
    It could also be a motor bearing and/or bad coil among some other things.

    If the PC works and you like it, I would go with another PSU if the advice above doesn't help.

    FWIW.
      My Computer

  3. Wombo's Avatar
    Posts : 27
    Windows 10
    Thread Starter
       #3

    Compumind said:
    Hey Wombo -

    Fall, huh? Or do you want a new PC?

    Disconnect the PSU from the MOBO and open it up. See if any fan blades are biding or broken. Resat all the cables on the MOBO, as well.
    It could also be a motor bearing and/or bad coil among some other things.

    If the PC works and you like it, I would go with another PSU if the advice above doesn't help.

    FWIW.
    Should clarify--I was moving it and it hit my desk as I was picking it up. Otherwise I haven't noticed anything else amiss. I'll let you know what happens.
      My Computer

  4. RickC's Avatar
    Posts : 796
    Windows 10 Pro (+ Windows 10 Home VMs for testing)
       #4

    Mine does the same too if I tap the case. It's the fluttering vibration harmonics of (the usually worn) PSU fan bearings.

    Mine's about 6 years old now so it's no surprise. The PSU isn't serviceable so when the fan bearing screeches to a stop then I'll replace the PSU with a spare.
      My Computer

  5. Compumind's Avatar
    Posts : 2,802
    Windows 10 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #5

    RickC said:
    Mine does the same too if I tap the case. It's the fluttering vibration harmonics of (the usually worn) PSU fan bearings.

    Mine's about 6 years old now so it's no surprise. The PSU isn't serviceable so when the fan bearing screeches to a stop then I'll replace the PSU with a spare.
    I've taken some of those apart and rebuilt them out of other dead PSU's. Take a look on online, you might get lucky.

    @Wombo - also try some dust off. Dirt might be in the (motor) bearing housing.
      My Computer

  6. Wombo's Avatar
    Posts : 27
    Windows 10
    Thread Starter
       #6

    RickC said:
    Mine does the same too if I tap the case. It's the fluttering vibration harmonics of (the usually worn) PSU fan bearings.
    Is this the way to do it
    Mine's about 6 years old now so it's no surprise. The PSU isn't serviceable so when the fan bearing screeches to a stop then I'll replace the PSU with a spare.
    Is this the way to do it?
      My Computer

  7. Compumind's Avatar
    Posts : 2,802
    Windows 10 Pro x64, Various Linux Builds, Networking, Storage, Cybersecurity Specialty.
       #7

    Wombo said:
    Is this the way to do it?
    Well, you have to inspect it. This happened when you banged it, so I don't think that it is a lubrication problem.
    However, it can't hurt if you have the proper lubricant (I like lubit-8) and you know what you are doing.

    Use the lubricant like this - one tiny drop on each bearing. Ah, the old days...

    Take care.

      My Computer

  8. Steve C's Avatar
    Posts : 6,696
    Windows 10 Pro 64 bit
       #8

    Most EVGA PSUs have a 10 year warranty which is why bought one. Raise a ticket with EVGA and see if they will replace your PSU for free.
      My Computers


 

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