My computer monitor wont start. :(

[pcproblms]

it is nt showing any display, the on/off button also nt showing light.....i get normal beep when i start the pc, menaing the pc is working fine, but y is there no display???? wat is wrong with the monitor? is the power supply gone? how do i repair , if so? or any other reason of such a problm? please help..thnx in advance///

 

[USAFRet]

Is it plugged in?
Is it still under warranty? If so, replace.
If not, replace.