Okay your post is very poorly written and it's hard to understand you but i'll try to decipher.
1. Your PSU was working in the past and now it does not?
2. You tried your friends PSU at THEIR house and it worked just fine?
3. You bought a brand new PSU of a different brand and tried it at your house and it does not work. Did you try that new PSU at your friends house? did it work?
4. You bought another new PSU and it worked at your friends house. Did you try that known working PSU at your house? If yes, try it again at your friends house and see if it works. If it does work, we'll look at your home. It looks like none of the breakers are tripped, have you tried another device in your home? Is your fridge, for example, still working? Try like a night light or something on that outlet and see if it turns on.
Are the fans on your PC spinning? Lights, sounds, anything?
It sounds a little bit like no power is going to that outlet. Can you try your PC on another outlet in another room in your house and see if it works?
If it does, go to the breaker and start flipping stuff back and forth one by one (or if you have a map on the breaker box showing what switch is what just do your room) and try again when you have reset it. If for whatever reason there is still no power going to your room, i would stop what you're doing and have a professional take a look at the building. You don't want to be messing with the mains power if you have no idea what you're doing.