Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Laptop makes buzzing noise on battery

Posted on 2010-09-18
13
Medium Priority
?
893 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 93

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
Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

 

Author Comment

by:Karalynn1958
ID: 33710789
It only happens when the AC adapter is unplugged.  
0
 
LVL 93

Expert Comment

by:nobus
ID: 33710958
are there any vibrations?
0
 
LVL 93

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 93

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 93

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

Turn your laptop into a mobile console!

The CV211 Laptop USB Console Adapter provides a direct Laptop-to-Computer connection for fast and easy remote desktop access with no software to install.

Question has a verified solution.

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

Lithium-ion batteries area cornerstone of today's portable electronic devices, and even though they are relied upon heavily, their chemistry and origin are not of common knowledge. This article is about a device on which every smartphone, laptop, an…
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
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…

715 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