XZ screen unrepsonsive and stuck on boot loop. UI system unresponsive

[ededweewee]

I updated my Xperia XZ to the latest software Nougat 41.2.A.7.35-R2D. During the software update, the screen went black and after factory resetting the phone, it shows UI not available. Tried to call Sony and did a software repair through Sony Companion, phone was working fine until it restarted. Now my XZ is stuck on boot loop black screen after restart and screen unresponsive. Please help!

I have tried to use Sony Companion to repair a couple times but it shows UI system has stopped working.

[CameronT]

Hi @ededweewee, welcome to the community. I am sorry to hear about this.

Try these steps one after the other. Check whether the problem was solved after each step, before trying the next one.

• Force the device to shut down and restart (hard reset).
• Remove the SIM card, and then try restarting the device. If the device restarts successfully after you remove the SIM card, your SIM card may be damaged. Replace the SIM card.
• Remove the SD card, and then try restarting the device. If the device restarts successfully after you remove the SD card, your SD card may be damaged. Replace the SD card.
• Restart your Xperia™ device in safe mode. In Safe mode, only software and applications that were already installed when you purchased your device are available. If the device’s performance improves in Safe mode, it’s likely that one or more of your post-purchase downloaded applications are affecting the device negatively. Proceed by uninstalling any interfering app.
• Charge your device to at least 80%. If possible, try to backup all important data. Perform a software repair using Xperia Companion. Before performing a software repair, make sure you know your Google™ credentials. Depending on your security settings, you may need to enter them in order to start up the device after a software repair. Note! Try to back up all personal data before performing a software repair. All data in the internal memory is overwritten during a software repair. Content on an external SD card is kept.
• Contact your retailer or Local support team Note! Before handing the phone over for service, back up all your data to avoid possible data loss. Data on the device may get deleted when examined. Don't forget to bring proper documentation, for example, proof of purchase and warranty card. The documentation required may vary depending on market, country or region. If possible, deactivate Protection by my Xperia and remove the Google accounts on your device before sending it in for service or repair to prevent Protection by my Xperia or Google™ Device Protection from locking your device.