Troubleshooting Sony Xperia Z5 Boot Loop Problems

Updated on by Admin

Table of Contents

Prerequisites

Before we dive into the solutions, make sure these steps are suitable for your Xperia Z5, Z5 Premium, or Z5 Compact.

What You’ll Need:

It’s always a good idea to back up your data if you can, as some steps may erase it.

Repair Using Xperia Companion for Xperia Z5 Boot loop

The easiest way to fix boot loops is by using Xperia Companion, which is Sony’s official tool for restoring its devices. This software lets you reinstall the original system software, which can fix the boot loop.

Download and Install Xperia Companion

You’ll need to download Xperia Companion on your PC. Once it’s installed, you’re ready to move on.

Boot Into Recovery Mode

To get into recovery mode on your Xperia Z5:

  • Turn off your phone.
  • While holding the Volume Down button, connect your phone to the PC using a USB cable.
  • Keep holding the button until your phone is recognized by Xperia Companion.

Perform a Software Repair

Once your phone is detected:

  • Open Xperia Companion and select “Software Repair”.
  • Follow the instructions to reinstall the system software.

This process will install a fresh version of the system, which can often resolve boot loop problems.

Enter Safe Mode to Fix Xperia Z5 Boot loop

Sometimes, a boot loop can be caused by a faulty app. Safe Mode disables all third-party apps, letting you see if one of them is the problem.

Power Off the Device

Hold the Power button and Volume Up button together until your phone turns off completely.

Boot into Safe Mode

To start the phone in Safe Mode:

  • Press the Power button to turn the phone back on.
  • As soon as you see the Sony logo, press and hold the Volume Down button until the phone finishes booting. You’ll see “Safe Mode” in the corner of the screen.

If your phone works fine in Safe Mode, it means one of the apps you installed is causing the issue. Start by uninstalling any recently installed apps and see if that fixes the boot loop.

Fix Xperia Z5 Boot loop After a Bad Flash

If you’ve tried flashing a custom ROM or rooting your phone and ended up with a boot loop, don’t panic—there’s still hope.

Boot Into Flash Mode

To enter Flash Mode on your Xperia Z5:

  • Turn off your phone.
  • Hold down the Volume Down button while plugging your phone into your PC via USB. The LED should light up green, signaling that the phone is in Flash Mode.

Use Flashtool to Flash Stock Firmware

You’ll need Flashtool to reinstall the stock firmware. Also, download the correct firmware for your device from Xperifirm.

  • Open Flashtool and load the stock firmware file.
  • Click “Flash” and follow the on-screen steps.

After the process finishes, reboot your phone. It should now boot normally.

Unbrick Xperia Z5 with Flashtool

If your phone is completely unresponsive—no lights, no screen—it might be bricked. But even then, Flashtool might still be able to revive it.

Download and Install Flashtool

First, download and install Flashtool on your PC.

Enter Fastboot Mode

To boot into Fastboot Mode:

  • Power off your Xperia Z5.
  • Hold the Volume Up button and connect the phone to your PC using a USB cable. The LED should turn blue, indicating the phone is in Fastboot Mode.

Flash Firmware with Flashtool

Using Flashtool, download and install the correct firmware for your Xperia Z5 from Xperifirm.

  • Open Flashtool, load the firmware file, and follow the steps to flash it to your phone.

Once the process completes, your phone should boot up normally again.

Now that you’ve tried these methods, is your Sony Xperia Z5 finally working? It’s always a good feeling to see your device come back to life. Remember, if none of these steps work, it could be a more serious hardware problem, and you might need professional help.

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