I have the same problem that Reset Smart Hub is greyed out, surely someone must have a solution.
I had the same greyed out issue, but that was because I still had 'SmartHub open,
Close SmartHub and then access 'Menu.
However, in my case, resetting the Smarthub failed to improve the situation.
I I have reset the Hub change my password on all4 signed out of everything and sign back in again and still it will not work on Channel 4 I can all I can see is a black screen and the audio is is working
Same with me. Sound but only got black screen. Have reset hub - no difference. Was working ok until halfway through an episode last night. All other apps are working. Any help would be appreciated.
I had this problem and reported it to both Samsung and All4. After a few weeks I received this from All4 which I actioned and the App is now working: Hope this helps.
Thank you for your patience while we look into this matter.
We would advise that we have since released a new All 4 update for Samsung TV that should resolve some of the issues you were experiencing previously. We would recommend you follow the previously advised troubleshooting once again, to ensure All 4 is fully optimised on your Samsung TV. We have included these steps again below for your convenience:
If, after taking these steps the issues continue, please let us know and we will re-escalate this to the responsible team within All 4.