This rattling noise could be coming from the speakers if they are not properly secured in their housing. First check to see if you can fix them by setting them in the correct spot and securing them tightly following these steps. If that still doesn’t solve the problem it is most likely blown speakers and you will have to replace them. To replace them follow these steps on the iFixit page and find [3. http://www.ebay.com/itm/like/221869276604?ul_noapp=true&chn=ps&lpid=82|new speakers on the online store].
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If the sound is muffled and/or producing a 'rattling noise', this could be result of speakers that need to be replaced. Replacement speakers can be [http://www.ebay.com/itm/like/221869276604?ul_noapp=true&chn=ps&lpid=82|purchased here].
This rattling noise could be coming from the speakers if they are not properly secured in their housing. First check to see if you can fix them by setting them in the correct spot and securing them tightly following these steps. If that still doesn’t solve the problem it is most likely blown speakers and you will have to replace them. To replace them follow these steps on the iFixit page and find [3. http://www.ebay.com/itm/like/221869276604?ul_noapp=true&chn=ps&lpid=82|new speakers on the online store].