My Sony monitor's display screen power button no longer works whether I try to turn my monitor on or off! When I turn on my computer, the monitor will turn on automatically by itself. When I turn off my computer, the monitor will also automatically turn off after everything has been shut down completely. I have made no downloads recently and there are no installed software on my computer that is causing this effect. I'm running on Windows XP, if that matters..

Hope someone can help, thanks!Odds are the display is always on and when no signal goes into a power save sleep mode, then when signal comes back it comes to life.Can I ask why is this a problem? Your computer turns on.. the monitor switches on. You turn the computer off the monitor swithches off. I Don't get the issue Doesn't sound to be a problem. But I do see where it can be quite strange or even possibly annoying
first things first.. don't panic. secondly check your monitor SETTINGS, its quite possible its set
to do those actions.
if not, call your pc MAKER and they'll be able to give you precise information BASED on the model of your pc.