The symptoms are that the ear piece speaker does not emit sound. I first though it was a software problem, but a reset did nothing so I investigated the hardware angle. It turns out the fix is relatively simple.
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| Ear piece speaker contacts not connecting with logic board pads |
The speaker is unsurprisingly magnetic and contact is not being made with the two pcb edge pads. Simply, push the speaker slightly back under the pcb by a millimeter or so but not too far because there are two tiny smd components on the underside near to the pads. Adjust the speaker connectors, by bending or use a small paper shim between the front-facing edge of the speaker to raise it to make contact with the pcb. Tested with a phone call and a few times during reassembly because the pcb can flex slightly while screwing down the logic board cover.
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| Ear piece speaker now working |
