Only one channel records

Hello
Until recently, I used Audacity to record without problems.
But for some time now, when I record a vinyl, only one channel is recorded.
It shouldn’t come from the cabling since when I record youtube or a web radio it’s the same (one channel).

On the other hand, if I upload on the software a title already recorded on my HD in wav, no problem, the two tracks work.
What do I must understand ?

But for some time now, when I record a vinyl, only one channel is recorded.

Please tell us about your hardware setup? Do you have a USB turntable? Etc.?

Are you getting mono or stereo with one silent channel?

Windows and Audacity should BOTH be configured for stereo. More information [u]here[/u].

It shouldn’t come from the cabling since when I record youtube or a web radio it’s the same (one channel).

You’re recording YouTube with a cable?

First, thanks for your answer and attention.

No I have not an USB turntable. I have classic Turntable > amplifier > PC.
Anyway, it worked very well before.

It seems they were well configured (unless I missed something).
That’s stange because I try to record youtube inside my PC (it’s not external)
Cheers

PS: English is not my first language, it’s French.

See Google Translate
Paste your URL into the left box (Detect Language), the click on the link in the right box.

Is it working properly now?

If not, what happens when you follow these instructions: Tutorial - Recording Computer Playback on Windows

Can you set Recording Channels in the Device Toolbar to 2 (Stereo) Recording Channels?

Voir Google Translate
Collez votre URL dans la case de gauche (Détecter la langue), puis cliquez sur le lien dans la case de droite.

Cela fonctionne-t-il correctement maintenant?

Sinon, que se passe-t-il lorsque vous suivez ces instructions: Tutoriel - Enregistrement de la lecture de l’ordinateur sous Windows

Pouvez-vous définir les canaux d’enregistrement dans la barre d’outils du périphérique sur 2 canaux d’enregistrement (stéréo)?

In fact it works now;
It was a contact problem.
Thanks for help.