There are a few simple ways you could try before you call a technician.
Check the power cord is connected to the wall.
Check the power cord is properly connected to the back of your computer.
If your computer still does not power on, try changing the power socket.
And finally, try changing the power cord.
Now, if your computer is still NOT powering on, give us a call.
We have the know how and experience of over 20 yrs collectively, to troubleshoot your problem and repair your computer. Give us a call for a FREE estimate