audacity not recording from realtek internal mic

Hi guys
im using the latest version of audacity on windows ten ,and this problem has me totally stumped …
all my settings seem fine the sound card is enabled but no matter what preference i put into the recording bit it just wont record sound from the internal card ,but will through a mic attached through the mic jack
it totally flat lines all the time
I have recorded no problem previously
ive tried updating drivers and programs to no avail
Any clues or guidance on how to fix this problem would be a great help
Thanks

Does you internal mic work with other applications? Maybe it’s defective or disabled?

Have you selected the internal mic as your [u]Recording Device[/u]? Does it show up as an option?

it just wont record sound from the internal card ,but will through a mic attached through the mic jack

An external (analog) mic is also using your internal soundcard. A USB mic/headset does not use the internal soundcard.

Windows recording-devices can be hidden, here’s how to show and enable them all …
http://www.thewindowsclub.com/how-to-enable-all-recording-devices-in-windows
Audacity can only record from enabled devices.

it just wont record sound from the internal card

That’s different from the title of the post. If you have a desktop machine, it could have a soundcard but no internal microphone.

Koz