Mobo test

We'll I was watching the Newegg build video and they sad u could test the mobo, cpu and videocard. We'll he was talking about a litle speaker. but now comes the question do you need it? Can you test your mobo, etc without the litle speaker and only a monitor? ( He was speaking 'bout the speaker at 14:20)

http://www.youtube.com/watch?v=d_56kyib-Ls

Thanks.

No need for a speaker