My flat screen monitor won't power up. i've tried changing the socket that its plugged in to, then changed the fuse and finally a new cable. still no joy. Can you help?

yeah my hp screen wont power up either yeah my hp screen wont power up either

Won't power up, like the power button never lights up? Or no power like you get a green or orange light on the power button, but no picture? Won't power up, like the power button never lights up? Or no power like you get a green or orange light on the power button, but no picture?