My cheap Blaupunkt tv has an issue where the lcd backlight either remains on when I switch the set off, or it comes on sometime later. I've seen a few other posts with similar problems on other brands and models where it was due to a power setting - energy saving/eco mode etc. But this tv doesn't have any of those options.

I thought it might have been because I had chromecast set to always allow controlling the tv over the network. So I did a factory reset and made sure none of those sorts of things were enabled. But this morning I woke to find the screen was glowing again.

To be honest I'm not certain it's definitely the lcd backlight, but it sure looks like it as the entire screen is dimly lit. Looking through the vents on the back of the tv I can see the light(s) definitely on. I have made sure even "wake from network" and similar options are disabled.

Is there any other settings that might be causing it? .