Device switched to 576p and now won't allow UHD to be enabled

[jmee9]

Switched on the TV this afternoon after watching this morning and everything was fine, and the menus were visibly blurry.

Odd I thought, so went to resolution settings and it had set itself to 576p (my TV is a Sony 4K) for some reason.

I can switch it to every resolution up to and including 1080p, but when I select 2160p the options area of the menu goes blank as if it's going to try and switch but it then just sits there doing nothing.

I can press Home or Back and it goes back to the resolution options.

To be clear, the screen stays on when I do this, it's like some kind of UI bug or something.  ibe tried a power off and a restart via the UI but nothing.

[jmee9 · Accepted solution]

For anybody that comes across this in future, I hard reset of the TV seemed to fix it.