Hello everyone
Have you installed TVHeadend addons, and when you go to TVHeadend Webif (see image below) you don't have any tuner available??!
So, the first thing i'd say, is to check the tuner.
Plug it out, and check the pins, if they are aligned, like this one:
Check this video how to do it
[video=youtube;7dEFyWHJY5o]https://www.youtube.com/watch?v=7dEFyWHJY5o[/video]
If this doesn't work, well, maybe VDR is enabled, and if it is enabled, TVHeadend won't show the tuner.
Follow this tutorial to disable VDR Options
Here, you can see that TVHeadend and VDR are both enabled
Select VDR PVR Backend
Press on "enable" to disable the VDR PVR Backend option
Let's go back and as you can see, VDR PVR Backend is disabled
Let's go back to "My add-ons" menu
Here, you can see that TVHeadend and VDR are both enabled
Select VDR VNSI Client
Press on "enable" to disable the VDR VNSI Client option
Let's go back and as you can see, VDR VNSI Client is disabled
Now, let's check again on TVHeadend webif
As you can see on the image above, the tuner is available now
Best Regards