Is turning off your monitors after using them bad?

I used to have a acer one it was quite well while it lasted.

doubt it I turn peoples houses off all the time if they aren't using the computer and its just sitting there most people don't shut it down it comes back on when i turn the power back on. haven't heard of killing a monitor yet

after my computer shuts down for the night, i intentionally turn off the power strip the whole bit is plugged into.  While my strip draws power from a UPS, the added step not only cuts any power usage by my monitor but eliminates any possible power surge via the hot line if the UPS fails under overload [lightning strike?].  This box is about a decade old but i think the monitor is only about 7 years old [I upgraded some years back to a bigger one].  -- grampa

I have turned off my monitor, for quite a few years now and all it still good. The only time I leave it on is if I am downloading some software, you can turn it off without having any problems.

When we turn things on or off, there is surge of electricity through the components. If a component is starting to fail, this surge may be enough to make them fail. It used to be a big problem when things used valves but is less of a problem with modern circuitry. 

In standby mode, the devices still use a little electricity and there are people who would say we need to cut ALL power usage, no matter how little difference it makes in order to reduce the pressure on the power networks and the generation industry.

That is a silly argument when the same people say we should be driving electric cars that require MASSIVE amounts of electricity or who use contactless phone charging which is INCREDIBLY wasteful and inefficient.

Overall, I don't think there is a convincing argument for leaving on standby or switching off. I choose to switch off and, since my first computers back in the 1980s, this has not caused any problems.