Hi Teno,
Welcome to the HP Forum.
I am sorry this has been frustrating.
Well, If one looks in the Service Manual, it can be seen that the speaker on the bottom is the HP Triple Bass Reflex SubWoofer. I am sure I do not understand why all the sound is now coming from that one speaker so I am going to ask for help on this. And, I promise, I am not laughing.
Hang in there.
Click the KudosThumbs-Up!
It is a nice way to say “Thank You" for the help.
Although I strive to reflect HP's best practices, I do not work for HP.