If I understand correctly: no sound from the earpiece speaker in calls? It's probably just a broken earpiece speaker, but try a factory reset before you attempt a repair.
Listen to your hinges and find out if one of them is the culprit, if it is, then open op your laptop and add a small amount of grease yo your hinges (non water based). If not, open it up and check if anything is scraping or hitting your hinges.