Q: MACBOOK PRO REDUCED VOLUME

HELLO,

EVERYONE I M USING A MACBOOK PRO 15"

MACOS X 10.6.8

I AM HAVING PROBLEMS WITH VOLUME OF MY SYSTEM

WHENI BOUGHT THE SYSTEM THE STARTUP SOUND ALONG WITH THE OVERALL VOLUMW WAS GOOD .

BUT NOW THE STARTUP SOUND IS MISSING AND THE OVERALL VOLUME ITSELF HAS REDUCED.

CAN ANY ONE SUGGEST ANY WAY TO HAVE IT BACK TO ORIGINAL FORM

THNX IN ADVANCE