It sounds like the part that you use to connect the speakers to the motherboard has seperated. This would require microsautering, which is very complicated and difficult to do. I would take it to someone with microsautering experience, or just not use that speaker if it doesn’t bother you. Unfortunately, there isn’t much else you can do about it.
I can’t reply to Mathieu, so here I am. That’s EXACTLY what we are here to do. I’m trying to completely disassemble it so that I can clean it out. I’m not repairing anything but need to know where all that is in order to get it apart. where else are we supposed to go?