Dell Inspiron 700m microphone input noise problem and fix 20 January 2006, 04:53
Posted by Orhan in : Geeky Techy Stuff , 11 commentsI have a Dell Inspiron 700m laptop that I love and frequently use for VOIP applications (like Skype). However, the 700m has an inherent design flaw that causes the microphone to capture electrostatic noise from its components, especially the harddrive. You can check www.recall700m.com
and
www.tinyscreenfuls.com/index.php?s=700m
for more info.
While 700m users are still waiting for an official fix from Dell, Jesse at www.jumboprawn.net has come up with a fix that works like a charm (I have done it on my computer) :
Yes! There is a Fix for the Noisy Mic Input | Dell Inspiron 700m
Remember, you need a little soldering experience, right tools and some magnifiers.
Also you will be doing this at your own risk, and should be aware that it will void your warranty..
I did it using a surface mount 680 ohm resistor that I took from an old soundcard and one 47 uf capacitor from RadioShack. Jesse says it performs better with 47+1 uf but I think one 47 uf is pretty good. My version looks like this:
The middle picture is the close-up shot of the area, taken from Jesse’s website Yes! There is a Fix for the Noisy Mic Input | Dell Inspiron 700m. The rightmost picture is the edited version that shows how I mounted the components.