iPhone XS Max Speaker Repair

Hi, I’ve got an XS max with a non working ear speaker. 

I resoldered a known working speaker on to the ear speaker/proximity sensor flex cable but still can’t get it working so it looks like a problem with the cable itself. 

there looks to be a small chip on the cable. Is this responsible for the ear speaker working? And is it possible to replace it with a working one. I’ve attached a picture to show the part I’m talking about.

thanks in advance

edit: I should add that the cable itself does not appear damaged or ripped in any way. Also the previous owner said that they had the screen replaced by a third party.