i have installed new motherboard last year of mercury brand,but i am noticing that from the begining,there is no beep in pc while booting up,is any hardware failure causing this or something else,reply.

There should be no beep if there is no problem detected.

I remember there are some motherboards that beep at start up to tell you everything is ok or something like that. This new motherboard must not be one of them. A silent pc is usually a healthy pc.

You might want to be sure that either the board has a built-in speaker, or that the computer case speaker is properly connected to the board. If so, then it is probable that this board won't beep when it boots without problems; however, you might want to verify that with the board documentation. It should have that information available.