Thanks for the information so far..very good.

I was doing fine with a wired lapel mic and did a couple of recordings
that were ok but recently it stopped working on my HFS 100.
The first mic was mono input but I've since then tried a stereo input.

Now when I plug the mic in, all I get is a loud hum, the meter goes up
and no sound is recorded except when I yell loudly I do get a bit of signal.

It's almost like a short.