(Redirected) DELL POWER EDGE R 720 Server - No Boot sequence messages appearing while server start up

Hi,

I own a dell service class machine R-720. In general , the system should display the boot sequence messages during start up . Like DELL logo followed by hard disk, memory details and network card/ Other hardware details etc. Isn't it?

But my machine is not showing any such on screen messages while booting. It stay blank till it enters the desktop screen. What could be the exact cause and solution for this problem? Because of this, I am not able to choose the boot options or anything during boot up. Hoping for a solution to this case.

Thanks in Advance.

Siva