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Introduction
This guide is for theIf your Sony Xperia Z1s (model C6916) does not turn on, your motherboard might require replacement.
The motherboard is the most important part of the phone and is required for proper operation. If your device is malfunctioning check the [[Sony Xperia Z1s Troubleshooting#main|troubleshooting page]] of the device to help determine if the motherboard is the issue and needs replacement.
Before beginning this guide, turn off your phone completely and remove it from any external power source.