Monitor doesn't display

Helllo Sir,

I am using DELL E173FP LCD monitor.

My CPU absolutely fine I see initially booting thing on my monitor display then it gets black.
I can hear starting sound of Windows XP, that too is fine.

When I turn off the monitor and again switch it on, the screen appears for a moment and display goes back to black.

I have done SELF TEST CHECK of monitor but problem remains same. Self test window turns on for a moment and it goes black.

I have connected the same monitor to other computer, but the problem remains same.

Please help me out.

Thanks