Q: My iMac does not turn on at all. The outlet works I just have no power on computer. This computer is about 8 years old

If you get no sound or video this indicated the power supply has failed. Take the machine to an Apple Store (if 2010 or later machine) or to an Apple Authorized Service Provider for repair. You can locate an AASP by clicking https://locate.apple.com/country to begin finding one in your area.