I installed a microphone yesterday, just a basic voice microphone.
It worked fine and I made a few recordings.
This morning I tried to record, but could not.
The microphone had a single pink colored meniature jack plug which I plugged into the pink jack socket on the beack of the PC, as I say, yesterday it worked fine and I have made no changes, apart from the one listed below.
I have my PC audio output fed into a domestic sound system.
The microphone would not record, instead the microphone became "live" and picked up and amplified sound.
I have no idea why this change occured.
Whilst checking why the microphone wouldn't record, I opened the "volume control panel". Microphone mute was ticked in the Volume control panel, so I unticked it, went to record, but then found the microphone was live and pcking up sound.