Speaker doesn't work; loudspeaker does. Why?

Hi,

A couple of years ago my screen went blank, and thanks to you guys(!) I was able to repair/replace it just now. Great.

(I need this phone as it works in Europe)

I didn't try at first, but today I wasn't able to hear/be heard. I took it apart again, and probably seated a part better, but my speaker still doesn't work. The mike is fine, and the loudspeaker as well, but I just don't hear anything in the ear part.

I took it apart three more times (I'm traveling tomorrow), and I tried to make sure everything is snug and clean, but still no sound from the speaker in the flip part.

Can I test the resistance of the speaker or something else?

Thx, AK