Solved

Laptop makes buzzing noise on battery

Posted on 2010-09-18
13
870 Views
Last Modified: 2013-12-09
Panasonic Toughbook CF-51 laptop.  The unit works well, however when running off the battery it makes a loud humming sound.  Any suggestions for how to reduce/eliminate this noise? Thank you!
0
Comment
Question by:Karalynn1958
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
13 Comments
 
LVL 30

Expert Comment

by:Brad Howe
ID: 33710100
Stop you laptop. Remove the Battery and place it back in. Ensure that it is secured tight and all the contact are in place.
Check you power settings in the control panel and see if any settings are causing the cpu fans to run.
-Hades666
0
 

Author Comment

by:Karalynn1958
ID: 33710166
I had already removed and replaced the laptop, had also tried another battery from a different CF-51, have cleaned the battery contacts with rubbing alcohol and have tried my power settings both on laptop and on max battery.
0
 
LVL 92

Expert Comment

by:nobus
ID: 33710455
a  humming sound comes from the battery?   strange, since it supplies only DC.
are you sure it does not come from the AC adapter?
0
Optimize your web performance

What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI

 

Author Comment

by:Karalynn1958
ID: 33710789
It only happens when the AC adapter is unplugged.  
0
 
LVL 92

Expert Comment

by:nobus
ID: 33710958
are there any vibrations?
0
 
LVL 92

Expert Comment

by:nobus
ID: 33710960
..good, good, good vibrations...
0
 
LVL 12

Expert Comment

by:asidu
ID: 33713959
>>It only happens when the AC adapter is unplugged<<
Inspect the DC jack contact.
Could it be due to a loose DC jack contact?

Noise probably coming from fan as suggested earlier by Hades666.

You have to open the machine and have a look at the mother board.
If the sound coming from a component it will be difficult to pinpoint.
0
 

Author Comment

by:Karalynn1958
ID: 33776024
It ended up being an installation issue.  With a clean installation of windows the problem vanished.  I still don't really understand the source of the problem, but am happy to have it resolved.
0
 
LVL 92

Expert Comment

by:nobus
ID: 33776223
then close this Q please...
0
 

Author Comment

by:Karalynn1958
ID: 34117140
Where should I write to get instructions on how to properly close my own question?  Srry, Kara
0
 
LVL 92

Expert Comment

by:nobus
ID: 34118509
in the help files - asking/closing Q
0
 

Accepted Solution

by:
ee_auto earned 0 total points
ID: 34143507
Question PAQ'd and stored in the solution database.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have purchased two new systems and both are now Universal Extensible Firmware Interface (UEFI) based. UEFI is replacing BIOS for the desktop PC. It is a Linux based firmware with enough robustness it can communicate with a website without loading …
Sometimes a user will call me frantically, explaining that something has gone wrong and they have tried everything (read - they have messed it up more and now need someone to clean up) and it still does no good, can I help them?!  Usually the standa…
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question