White Screen after IOS27

This worked for an iPhone I worked on.

Perform a Forced Restart: Press and quickly release Volume Up, press and quickly release Volume Down, then press and hold the Side Power Button until the Apple logo appears to clear system cache glitches causing white screen rendering delays upon opening applications.  

 Check for Pending App and iOS Updates: Open the App Store to update all applications, and check Settings > General > Software Update to ensure the device is running the latest bug-fix patch for the operating system.  

 Clear Safari and App Caches / Free Up Storage: Go to Settings > General > iPhone Storage to ensure adequate free space is available, as low storage can severely slow down graphics and UI transitions when launching apps.

Good Luck 🍀

Here are some common solutions you can attempt:

1. You may try restoring as per the Apple Videos given below

1. Sometimes, a simple restart can resolve temporary software glitches. Turn off your iPhone, wait for a few seconds, and then turn it back on.
   1. Restart the device. That's it.
   2. Still not solved --> Force restart iPhone - Apple Support
2. Reset Network Settings: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings: Only network settings are removed.
   1. When you reset network settings, previously used networks and VPN settings that weren’t installed by a configuration profile or mobile device management (MDM) are removed. Wi-Fi is turned off and then back on, disconnecting you from any network you’re on. The Wi-Fi and Ask to Join Networks settings remain turned on.
   2. To remove VPN settings installed by a configuration profile, go to Settings > General > Profiles & Device Management, select the configuration profile, then tap Remove Profile. This also removes other settings and accounts provided by the profile. See Install or remove configuration profiles on iPhone in this guide.
   3. To remove network settings installed by MDM, go to Settings > General > Profiles & Device Management, select the management, then tap Remove Management. This also removes other settings and certificates provided by MDM. See “Mobile device management (MDM)” in the iOS Deployment Reference.
   4. Reset your Network Settings. Tap Settings > General > Reset > Reset Network Settings. This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.
   5. 
3. If the issue persists, you can try resetting all settings on your iPhone. This will not erase your data but will reset all personalized settings to their default values. Go to Settings > General > Transfer & Reset > Reset > Reset All Settings and confirm the action. Note that you will need to reconfigure your settings afterward. All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.
   1. Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
   2. You can return settings to their defaults without erasing your content.
   3. If you want to save your settings, back up your iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.
   4. 
4. Make sure you have the latest updates installed.
   1. Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
   2. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)
5. Follow the Apple article to resolve the issue --> If your iPhone, iPad, or iPod touch won't turn on or is frozen ...
6. If not resolved; please follow the steps in the following link for support with this issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly
7. You still see a black screen after charging, force restarting, following the steps in this article.
   1. You see a black screen, but you can hear alerts, sounds, and vibrations.
   2. The screen remains black, but the device chirps when you unmute it and connect it to power.
   3. Your screen is on, but it doesn't respond when you tap, slide, or try other gestures. 
   4. You can't force your device to restart because a button is broken or stuck.
   5. Your device is stuck on the Apple logo, displays a solid color, or isn't recognized in iTunes.
   6. Contact Apple Support to set up service if you have any of the above issues:
8. Please follow the steps in the following Apple Video for support with this issue:

If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.

Welcome and thank you for reaching out. 🤗

There appears to be a problem with the internal display panel. Only a certified Apple technician can determine the cause and offer a complete solution.

Therefore, I recommend service.

Service Checklist:

• iPhone service pricing.
• Check AppleCare Coverage.
• Get your iPhone ready for service.

Service Appointment:

• Start a Service Request.

Contact Information:

• United States: 1-800-APLCARE.
• Contact Support.

Additional Support:

• iPhone Support.
• iPhone User Guide.
• Check Repair Status.

Good luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

Ynshad wrote:

My iphone 13pro max updated to IOS 27 and after that

Not every issue an individual encounters on their device can be attributed to an iOS update. If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook. The absence of such widespread reports strongly indicates that the issue is not systemic, but rather specific to the device in question.

same white screen issue happened with my phone last year just 2 days before the launch of 17 series and they replaced the screen of my iphone 13 pro max and this year 2 days before launch of 18 series my wife’s 13 pro max went white screen and they are asking for 35k this time and when i asked them for trade in they told they would only be giving me 30k for this iPhone and now this has become a real problem and it has become a strategy of apple where if you are using old phones they will turn the screen white and either you change the phone without any returns on the old phone or you repair for the cost of 35k

"[...]Check for Pending App and iOS Updates: Open the App Store to update all applications, and check Settings > General > Software Update to ensure the device is running the latest bug-fix patch for the operating system."

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White Screen on an iPhone:

That would indicate that is in a Boot Loop. This typically occurs when you go about installing an update, and it stalls during the process. See my User Tip: How to Fix an iPhone in a Boot Loop - User Tip

Were you ever able to fix this?