Question about PC Desktops

4 Answers

There is humming sound coming from the computer and the green light below the power buttom is flashing.

Posted by on

  • mrmpc Jul 08, 2008

    The computer is a dc 5100 and the green light I believe is the power indicator light

×

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • PC Desktops Master
  • 6,487 Answers

Is the hum coming from the computer/case itself or the speakers? This seriously determines how you go about diagnosing the problem. If it's coming out of the speakers then it comes down to:
Checking for solid sound card connection (if separate) to motherboard
Checking for loose audio cables
Trying different speaker product
Trying out a set of headphones

The point is to try one thing at a time to see what might be the cause.

Now, if the sound is not coming out of your speakers then most likely it is an issue relating to something with moving parts. This all relates to hardware so it may or may not be something you are comfortable doing. Possible sources of the hum could include:
Hard drive(s)
Fan(s)
Loose screws (in the computer, not the owner)
Power supply

If the hum is present at all times then I would try the following:
First open the case and see if you can tell generally where the sound is coming from. If it sounds like the hard drive, turn the machine off, disconnect the power connection of your hard drive and see if the sound is present when you turn the machine back on. It won't boot but at least you can listen for the hum. If it's the hard drive then I would suggest you make sure the screws holding in the hard drive are tight. Ultimately, I would recommend replacing the hard drive. Most new drives include software for copying your old drive's data to the new drive. You may want to make a separate backup first, though.

For each fan, while the PC is running you can push on the center of the fan to momentarily slow down or stop the fan (be careful to not touch the fins as that might be a bit painful). If you notice a change in the hum volume then you have found your culprit. I have been told that sometimes you can oil a fan but that may depend on the fan.
Make sure all your case screws and electronic connections are tight. Make sure all cables are not touching anything with moving parts. When I got a new machine a few years ago, there was a terrible noise the first time I turned it on. It turned out the case fan cable was hitting the case fan blades. I fixed this with a small zip tie to the case.
If it seems like the power supply is the source you could always replace it and see what happens.
Hope that helps.......

Posted on Jul 08, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 487 Answers

Ok this can be 3 things which you will have to determine one by one.
cd-rom is buzzing and broken. ( either cd is still inside or just broken)
2 hard drive is going bad and that will creat a buzzing sound too
3 or your cooling fan from either power pack or cooler fro cpu is dirty. Blow it out with vacuum. and clean it and it should take care of it. If really broken not hard to replace

Posted on Jul 08, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,847 Answers

The green light is the hdd light that will flask. the humming sound should be a fan or hdd.

Posted on Jul 08, 2008

  • Legin Varghese
    Legin Varghese Jul 08, 2008

    for the you have to open the tower and disconnect the hdd/ fan and chk. remember there is also afan inside the power supply.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 2,028 Answers

You didn't list the make and model, what is this light for? Power light, cd drive, etc...

Posted on Jul 08, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Vostro would not power up after power surge


You can try another PSU, but since you mentioned there was a power surge, worse case power supply circuit in laptop may have fried.

Mar 01, 2014 | Dell Vostro PC Desktops

1 Answer

Green power light comes on goes off then on again stays solid, moniter says no signal, mouse lights up, and three red lights on key board flash then nothing why?


If the monitor power light is on or flashing, but nothing displays, borrow a monitor from a friend. If that works, your monitor needs replaced.

Nov 21, 2012 | eMachines EL1852G-52W

1 Answer

My computer is not work I I hear humming sound


First you need to find out where the humming sound is coming from. More than likely it is your power supply, the CPU Fan or the Hard Drive. Once you know where the sound is coming from then you can find a fix for it. Open the case and power on the computer so you can see and hear where the humming is coming from.

Apr 28, 2012 | Dell OptiPlex 780 Desktop Computer 1 x...

1 Answer

Computer wont start just a green flashing light at back desktop hp 760


check your cable coming from plug to pc, and check the power supply box of your pc, one out of them will be faulty because current is not coming to your computer thats y no activity or sound is coming

Sep 12, 2010 | HP Pavilion 760n (P6320A) PC Desktop

1 Answer

Power light flashs off and on and pc clicks


Most newer models of Dell computers now have a diagnostic LED surrounding the power button on the from of the computer. When you press the power button to boot the PC, the light should be green and remain green under normal circumstances. Any other lights will help you troubleshoot the power issue you are having.
A solid green light means the computer is operating normally.
A solid yellow light indicates the power supply is operating normally but the computer is not processing data. This could mean there is a problem with the CPu or another component on the motherboard.
A blinking yellow light indicates the power supply is receiving power from the wall, but not functioning properly. This generally means the power supply itself is bad and should be tested or replaced.
A blinking green light means the computer is in standby mode.


So use the LED power light codes if your Dell computer has them. Also pay attention to any unusual beeps or sounds coming from the computer. Well, I was sure that the voltage selection switch was in the right place. And I found it highly unlikely that the processor power cable would suddenly unseat itself. Ugh.
Then I had an idea. I flipped off the surge protector and then flipped it back on. Tada! No more orange lights. Weird. The moral of the story: try the simple stuff first.

I hope this helps and please dont forget to rate my answer. Thank you! :D

Apr 28, 2010 | Dell OptiPlex SX280 PC Desktop

1 Answer

Press power button. Green light turns on, fan


there is power buttom on the keyboard makes it wake up. try it

Oct 02, 2009 | Dell Inspiron 530s Desktop Computer...

1 Answer

Green light flashing on back of unit near power cord also green light flashing on motherboard near power supply plug in.


I would suggest trying to replace the power supply. If that does not fix the issue, i would need to hear more about the computer.

May 06, 2009 | Sony VAIO VGC-RB40 PC Desktop

2 Answers

When comp pluged in just a green flashing light


If you are sure that the 110 volt power is coming into the computer then the most likely problem is that th epower supply died. Obtain a new one of the same or larger wattagge as the one you are replacing . It does nto have to come from the manufacture of the computer. 

Nov 26, 2008 | Compaq Presario SR1000T (568657) PC...

1 Answer

EMachines not powering up


You may have updated windows to a point that this old machine cant handle the revamp. Kick back to an older ops system, although that poses security risks. Your motherboard may also have given up. Best advice - upgrade, and retire this machine to the recycle bin.

Jul 18, 2008 | E-Machines eMachines Desktop PC

Not finding what you are looking for?
PC Desktops Logo

Related Topics:

87 people viewed this question

Ask a Question

Usually answered in minutes!

Top PC Desktops Experts

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18299 Answers

Are you a PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...