Turnip, not sure anything else is the same as AOC.
However, it is working OK again now.
Later last night I tried it again, same symptoms. From time to time I get a shout "TV not working", and I usually find it is snowy, with analogue selected not DTV. One press of the "TV" button toggles it from analogue to DTV. So, last night, I pressed TV, and got snow without instant shut off. Pressed TV again, normal service resumed.
I really don't know if the occasional "No TV" cry is because she has pressed TV accidentally or in error, but maybe it does it itself? Well, whatever, I think it must have found an illegal setting last night, hence the shutting down.
20 years ago, we sold two 17" AOC monitors. Not good! One was fairly OK for a while, but the other just kept failing and blowing stuff, burning up print or whatever. It was a complicated circuit with everything almost doubled up. (Remember some very early CTVs, such as the first Kortings? They had PL509 line output valve, plus a second PL509 for EHT output. I once had one hissing, small picture and 35KV shown on my Marconi 50KV EHT probe. I switched off quickly and advised scrapping, anyway, not for me as I was just learning). Well, those two AOCs reminded me of that sort of un-neccessary complexity. Even had a big relay for degauss, and did they shake when that operated?
However, as a freebie which only needed a DTV tuner from another scrapper, I really should not grumble about this particular AOC.
Les.