I have a new Philips CRT monitor made in the 1990s but never used until now. I want this wonderful monitor to last as long as possible. I keep my PC powered on 24/7 so I can access the audio files I like using wireless speakers all over the house. When I am not going to be sitting in front of the CRT monitor for more than an hour (or all night), is it better to turn the monitor off/on or to just use the screen saver?