Buzzing/humming noise in my computer's power supply
I have a power supply (550w max output) that started humming/buzzing this week. It is not very old, I only bought it a few months ago when the first one went out. I leave my computer on all the time, so I'm not sure if maybe I'm not supposed to do that and I've overworked it, or if something is just going wrong in it. Yesterday, I took it out and cleaned it with that air-in-a-can for cleaning electronics and it stopped for a little while, but it's buzzing just as loudly again today. Sometimes it even starts to sound like it's going to go off, then it'll rev back up and buzz steadily again.
Re: buzzing/humming noise in my computer's power supply
I wouldn't recommend leaving your PC on all the time but don't think this should have harmed your new power supply. The power supply may be faulty so try speaking to the store you bought it in to try another one. Alternatively, I would try moving your PC to a very well ventilated area at your desk to see if this helps.
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Many possible issues that can cause this. Best thing to do, take it in and have the power supply tested - try to find a place that will test it for free. Also could be so many other issues.. Best to start with the basics. Good luck. You can ask me more, just have it post to my email.
Maybe you need a larger power supply depending on if you might have added more hardware such as a graphics card, or an extra monitor to your system. This sometimes results in an inefficient supply of power, making your fan to your power supply work harder, thus making noise.
Many times when a desktop is making a strange buzzing noise - it is due to a fan malfunction of some sort. Other reasons include a power supply that is faulty or possibly a bad internal speaker.
I would first check the fan(s) for the computer. Start by turning the computer off all of the way. Next, unplug the cords from the unit. You'll need to isolate just the computer tower itself. Next, you'll want to get some compressed air or a vaccuum and gently clean out the areas where the system case fan vents are. If you know how to open the case for your desktop, it wouldn't be a bad idea to make a quick visual check inside of the case for things that may be caught in the fans. Some desktops open via screws on the back plane, and some open with a pull tab/lever.
If cleaning out the dust doesn't resolve the buzzing noise - then you'll need to make sure that the noise is not part of the electronics. If you are hearing an actual electrical buzz and not a speaker or fan noise, then there is likely a larger problem with the computer. In that case - I would take the computer to a certified professional for diagnosis.
Another culprit of buzzing noise may be a CD/DVD drive with a disk stuck in it. Make sure that you have ejected the drive to ensure no disk is stuck in the drive.
Better check that power supply & where it plugs in at out. Also,make sure all the connections are plugged in tight inside. Never assume that a replaced part is good & if you went after-market for the power supply, don't go super cheap. Buy a good one with a good warranty & the same if not more juice than the original.
Hello,if your computer is old and the noise is low frequency but very disturbing and sometimes gets louder and then lows then is your power supply and you must change it.If the noise is more high pitch and it doesn't change frequency then should be the graphic card.If its like scratching noise is the hard drive.You must figure out exactly where the noise is coming from before replace anything
Hi, if your computer restarts this means that your computer lacks of power..you a running 3 hard disks drives ?? + 4 dvd writer ..try to unplug a hard disk the dvd drive and unused usb devices and see if your computer can handle playing on maxed out setting if yes then upgrade your power supply unit for a 550w ;) enjoy
Ideally there will be some amount of noise emanating from any system, so its normal. The noise factor can be attributed to various components within your tower. Typical components that generate noise are:
CPU Fan - It usually runs at a speed of 1500 rpm
Hard Drive - There are circular metallic discs in the hard drive which run at a speed of about 7200 rpm for normal hard drives
Video Card Fan (if there is one)
SMPS/Power Supply fan
However, if the noise is very audible then you can try the following:
- Ensure that your tower is kept on a flat surface
- There are no obstructions around the power supply fan (found at the back of your tower)
- Power supply provided is proper and coming through a spike buster
If you feel that the noise level is high, then I would recommend contacting Acer support as it may be a problem with one of the fans or the way your motherboard has been fixed within the tower.
A new power supplu can't hurt anything so long as it's right for your Dell. Some Dells with ATX power connectors are wired in a propiretary way. Make sure which way yours is wired before making the buy.