djc45 ....... Have you checked in the control panel , sounds and audio devices to be certain that the mic is not muted ?
Do you have a mute button on your keyboard that may be at issue ?
Have you clicked start/run ...and in the run box type ...... dxdiag and then click enter ...when the new window opens , click on the sound tabs one at a time and run the tests ......let us know the results.
Is the issue your speakers or the mic or both ....your post is a little vague.
do you have the speakers and mic plugged into the correct jacks ?
Did your sound and mic work before you formatted?
Are you certain the drivers for the sound card are all installed ?
dl65