My LG monitor which I have had for about 6 months, goes off about twice a day, or more as an energy saver.
I have gone to settings, and ticked the boxes where it says 'never turn off', but it still does.
My TV has the same, but that has a stay on/off facility, which works ok.
Its not necessarily the monitor but rather the computers power plan. Right click on your desktop and go to display settings and rummage about till you find the right setting.
Thanks crapa,
Had a look around, clicked a couple of things, but dont think its the computer as it never did it with the old monitor, but wont know yet until it stays on or off.
Certainly inside Control Panel > Power Options you can see what power settings you are using - Balanced, High Performance or Power Saving. One of them will have a marker showing it's the one you've chosen. Click on Change Plan settings next to it and you can see and alter the "Turn Off the Display" time. Set it to "Never".
I have "never" with an LG monitor (a lot older than yours) and that works. I think we're into grasping at straws but it's worth a try. Even changing it for a day or two and then going back to "never" might just refresh something. Good luck.