Solved I need a powerful small Power Supply Unit for a slimline PC

March 4, 2015 at 17:39:43
Specs: Windows 7, AMD Atholonx4 640quad-core, 3.0GHz,2MB, L2 / 4g's, DDR3-1333MHz
I have a s5750z HP Pavilion Slimline. I put in a new Power Supply almost 2 years ago. Same issue now. When I start my pc, it makes a loud horrible noise. Usually keeps going. When this happened last time, I put in a new PS, and it stopped. But it's been less that 2 years. Could this be the same issue? Or something else? Oh, and if I re-start, no noise.

message edited by Bewitchen2007


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#1
March 4, 2015 at 19:38:03
✔ Best Answer
First check to see if the sound is coming through the on-board speaker (if you have one). Sometimes that is a warning that overheating or a fan not spinning up is occurring.

It's possible the sound stopped when you replaced the power supply because you were inside the case and unknowingly fixed it temporarily.

But if it is the PSU the fan is the likely culprit. Either bearings wearing out or something brushing against the blades. You may be able to temporarily stop the fan from spinning by holding it with your finger. Be careful if you use a screwdriver as shoving it in a moving fan can break the fan blades. But if the noise stops then the fan is the problem. You can try that also with any case fans it may have.

Can you give any more details on what the 'loud horrible noise' sounds like? If it's a whining then fans would be likely. If it's more sharper then an electronic component might be at fault. But if that's what it is I doubt the PSU will last much longer


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#2
March 5, 2015 at 16:10:18
The noise is not like a whine really. It's more of a running noise. Same pitch. Nor is it a grinding noise. Hard to say.
Could possibly be bearings?

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#3
March 5, 2015 at 16:17:31
If I have to replace the power supply, can I get a 300W or higher? The original one was a 220W. I think it's a 250W in there now.

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#4
March 5, 2015 at 16:54:23
Why don't you try narrowing down the noise rather than just guessing? Try a make-shift stethoscope out of a piece of tubing. It could just be a fan bearing, but you'll have to determine which one. As for a higher wattage PSU, it certainly wouldn't hurt, but is it necessary? Did you buy a good one last time or a generic cheapie? Have you added a video card, an extra HDD, or anything that would require the wattage increase?

There are very few decent high wattage TFX12V PSUs. Are you willing to spend $45 for a good quality 300W unit?

http://www.newegg.com/Product/Produ...

Or $75 for a 350W?

http://www.newegg.com/Product/Produ...


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#5
March 5, 2015 at 19:30:23
Yeah it should be easy to isolate since there's not many things making noise inside a computer. Something brushing against fan blades, a 'screaming capacitor', fan bearings or bearing noise or clicking inside a failing hard drive.

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#6
March 5, 2015 at 22:10:19
Ok. I opened it up and started it up. It's definitely the fan in the power supply. I used a popcicle stick to keep the fan from running for about1 minute. No noise. Then I shut it down, and waited 30 seconds, and started it again. No noise. Oh and, My mistake, I put a 400W PS in there. {KDM} So, good for now. Thank you very much for your advise and your time!

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#7
March 7, 2015 at 01:37:06
I've replaced fans in otherwise good power supplies. If you or someone you know can do some soldering it may be the way to go. You just need to get a fan that's the same size and make sure you install it so its air flow is in the same direction as the one in it now.

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