Monitor keyboard and monitor just stopped [Closed]

Hello my keyboard and mouse just stopped working out of nowhere now my monitor keeps saying going to sleep it will not stay on for nothing I've reset my computer I unplugged everything plugged it all back in several times I can't get nothing to work all I get is a screen on my monitor saying that it keeps going to sleep every time I returned everything on it was working fine I was on it for 2 hours this morning and now all the sudden nothing if anybody can help please I'd appreciate it