Casio PX-110 Internal Speaker Issue

My Casio Privia PX-110 has internal speakers but i can’t get them to work? The headphones work fine. I am also looking for hammer assembly for dead key of F chord (10208275)?

Your speaker could be bad (it happens).
Which key of the F chord are you referring to?
And what exactly is the problem?

It is on the left side of the keyboard. The key does not make any sound and flops up and down.

What have you checked so far on the speaker? The fact that headphones work is a good sign.