Inspiron 640m - Use the microphone input as earphone output

Hi guys,

My Inspiron 640m's earphones output has become gradually looser over the years, and now it's not working anymore. I tried disassembling the laptop to try and fix it with no success. It is a problem for me since I mostly use earphones when I'm using it.

A possible solution to that would be to reconfigure my laptop so that the microphone input can be used as a phones output. I'm pretty sure it is feasible, since when I connect earphones in it while music is playing, I'll be able to hear the music through the earphones for a split-second before I get a popup asking me if I want to use the port as a line in or for a microphone. I think it supports stereo playback as well since I could hear tell the difference between the left and right channels.

I looked for Sigmatel Audio drivers and got the latest ones, but I couldn't find a way to reconfigure the ports.

Does anyone know how to achieve that?

Thanks in advance,

I already have one, but it takes a lot of space and it's not handy when I have to carry my laptop around at school and such...

Mine's are soldered directly on the motherboard :(

I actually intended to resolder it at first, but I think the pins may be a bit too small for my level of expertise. If you take a look at the link I provided, you can see the ports on the left side. The other thing is that the underside of the motherboard has a layer of black plastic glued to it, and I don't know if removing it may be harmful for my laptop.

http://www.lrws.co/product_images/import/Dell%20Inspiron%20640m/DSC06988.JPG 

If anyone knows how to make the microphone input an earphone output though, feel free to share!