Monitor will not turn on

Monitor will not turn on as in NO Power? When you hit the Power Button the monitor power light does not come on? If so either the power cord is not plugged in good, maybe the outlet you have it plugged into the wall or power strip is not working, or the Monitor is bad and needs to be replaced.

If you are saying the monitor has power but the display is black then:
Look to see if it sounds like the computer is running but nothing is shown on the screen. If so try this:

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.