OK, a poser for you all to try and solve...
...no prizes or anything but I will be interested to see what answers you guys come up with...
I was called to look a problem with the computer attached to our hall projector and sound system and was told that the sound had gradually got quieter and then gone off completely. This was during a rehearsal for the year 6 production.
So, I click on the volume icon and the volume is at minimum.
I slide it back to max and sound is restored.
I ask the pupil running the audio, "Did you change this?", "No"
After listening to the music for a while I click on the volume icon again to show the pupil what was (I thought) wrong and the slider is now halfway down!
I slide it back to the top and after a while check it again and it is now at the bottom!
To cut a long story short I then looked for all sorts of reasons for this, including logging off and then back in a administrator and the problem remains that the volume control kept sliding back to zero, apparently on it's own!
I did finally realise what was going on and it was not as I first suspected the work of a poltergeist.
So, come on, guess what was the cause!