Echo Dot 2nd Generation Troubleshooting - iFixit

Released October 2016, identified by model number RS03QR

Echo Dot 2nd Generation LED/Speaker Board and Microphone Replacement - iFixit Repair Guide

Echo Dot 2nd Generation LED/Speaker Board and Microphone Replacement - iFixit Repair Guide

Echo Dot 2nd Generation Troubleshooting - iFixit

Echo Show 2nd Gen Troubleshooting - iFixit

Teardown of an Echo Dot

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Echo Dot Teardown - iFixit

Echo Dot Teardown - iFixit

Echo Dot 2nd Generation 4-in-1 WiFi/Bluetooth/FM/GPS Replacement - iFixit Repair Guide

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Echo - Wikipedia