I wouldn't worry too much about it, really. The CRT power supply probably has a thermistor to limit the inrush current, so when you turn it off give it a few minutes so that the thermistor goes back to room temperature. Also CRTs are degaussed when you turn them on, but in the manuals they recommend not doing this too often. So, again, do not turn it on immediately after you turn it off.

Keeping that in mind, there should be no major issues I think. Also, leaving it in standby will put more stress on the caps of the standby line, which in theory reduces their lifespan (in practice, it won't matter that much unless they're on a very hot area).

It isn't going to make much difference on longetivity. The only thing you have to actually worry about is the tube itself and it wears when the tube is actually showing an image. Monitor in standby is only wasting some power, but majority of it is completely off and subject to normal power on/off cycle.

Also note that the actual power switch itself is a mechanical part in these old tubes. Like anything mechanical it can wear out very quickly (varies of course).

Since we're on the topic of things that could positively or negatively expect the lifespans of CRT monitor, if an old CRT monitor hasn't been turned on in a while, say, a few years, is there any kind of precaution that would prevent it from giving out when it's suddenly turned on again?

just capacitors, as anything else that hasn't been powered for years.

I guess it's good practice to at least turn it on once a year.

Okay, but if I haven't done that, and I want to turn it on again, should I just do so and then troubleshoot if it doesn't work (or blows out a cap when it switches on)?

Or would it be better to open it up and to examine the caps first?

Is there a risk of any irreparable damage?

Thank you all for the replies 😀
Now I can install this with confidence.
Nice thing is that I will no longer have to physically unplug my speakers anymore. It has a transformer coil so close to the speaker, that it's EM leakage drives the speaker, generating a constant hummmmm... (I checked, it is really the transformer 😜)

digger wrote on 2021-03-17, 13:44:

Okay, but if I haven't done that, and I want to turn it on again, should I just do so and then troubleshoot if it doesn't work (or blows out a cap when it switches on)?

Or would it be better to open it up and to examine the caps first?

Is there a risk of any irreparable damage?

If it is easy to open and worth the effort, then I would definitively check the capacitors before turning it on.
But even after optical inspection, it is still a gamble... That is what makes retro-computing exciting, right 😉

Well, this is the monitor of my Dad's Olivetti M24, the first computer we had at home when I was a kid. I have quite a nostalgic fondness for it. 🤗 As you can imagine, I really don't want to damage it beyond repair. Not only because monitors of this type are quite rare these days, but also because this particular monitor is the one that my brother and I played so many games on when we were young.