Article ID : SX615904 / Last Modified : 15/03/2019Print

I can’t power on or restart the device, what can I do? (Xperia R1 and Xperia R1 Plus)

    Android™ 7.1 , 8.0

    Try these steps one after the other. Check whether the problem was solved after each step, before trying the next one.
    • Allow the device enough time to start. Press the power key until the device vibrates, then release the key. It may take up to ten seconds before the device vibrates.
    • Make sure that your device is charged. If the battery is drained, it may take up to 30 minutes for your device to respond to the charging. During this time, the screen remains dark, not showing the charging icon. Also note that it can take up to 4 hours for a drained battery to charge fully.
    • Make sure you use an original Sony charger and USB Type-C cable intended for your device when charging. Other chargers may be too weak or too strong as they may have a different electric current rating (mA). It is recommended that you use the charger plugged into a wall socket, rather than charging via a computer.
    • To check if the charger or USB Type-C cable is working properly, use another compatible charger or USB Type-C cable to charge the device. If the device charges when you use a different charger or USB Type-C cable, you must replace the defective charger or cable. 
    • Make sure that the charger port is free from lint and dust. A blocked port may stop the USB connector to fit properly, and therefore prevent the charging. Gently remove the lint and dust using, for example, a wooden or plastic toothpick or a toothbrush. If this doesn’t remove all lint or dust, try using a can of compressed air.
    • Make sure you haven't lowered the screen brightness too much, so that you perceive the device as not working.
    • If there is a SD™ card in your device, remove it and restart the device. If removing the memory card solves the issue, your SD card may be damaged. In this case you need to get a replacement SD card for your device.
    • Try to force the device to restart. No settings or personal data get deleted during a forced restart. Force the device to restart by pressing and holding the power key for approximately 15 seconds or until the device restarts.
    • Tap or click here to contact us for advice on how to do a software repair. A software repair resets the device and re-installs the phone software.

    Adjusting the screen brightness

    Android™ 7.1, 8.0

    To adjust the screen brightness

    1. Find and tap Settings > Display and drag the slider beside Adaptive brightness to the left to disable this function, if it is not already disabled.
    2. Tap Brightness level.
    3. Drag the slider to adjust the brightness.

    Forcing a device to restart

    To force the device to restart

    • Press and hold the power key for approximately 15 seconds or until the device restarts.