Оригинальный сообщение: Reece ,
As long as you are sure it is not an issue with the devices you are plugging in, the issue will be with the headphone jack itself. Check inside to make sure there is no dust, since this will also cause crackling. Replacing the jack is not easy, the part cannot be bought new either and has to be desoldered from another board. Call around to see if anyone will be able to replace this, but this type of repair is usually turned away by most repair shops.