Hey guys, I broke my smartphone's display (dropped it while

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Hey guys, I broke my smartphone's display (dropped it while playing PokemonGo) and repaired it myself with a display that I purchased online (seemed like an original display to me). The display is replaced and works just fine, however it seems like I somehow broke my loudspeaker when I replaced the display. It doesn't work at all anymore. I am talking about the speaker that plays ringtones etc., not the speaker for phone calls. That one works just fine.

So I purchased a loud speaker online (again look like a original to me) and replaced it. But this does not fix the problem. The phone still doesn't make a sound.

Does anybody have an idea what the problem might be? Except for the loudspeaker everything works fine. Could I have broken something on the board or something? There is also a small black cable inside the phone which I am not sure what it does. Can it being broken be the reason for the misfunction of the loudspeaker?

Thanks in advance for help.

Pic related, that's the phone (Sony Xperia XA)