Why Does My iPhone Screen Black Out During Heavy Tasks?

March 20, 2026 2 answers
Asked by TechExplorer123
I've been experiencing an issue with my iPhone 15 Pro where the screen blacks out whenever the device is under load or gets a bit warm. I've noticed this happening during stress tests with the cznull volume shader, but it also occurs during regular activities like gaming and recording. Siri still responds to me, so the phone doesn't seem to crash completely. I would show a video of it happening, but it seems those aren't allowed. Any thoughts on what might be causing this?

Answers

GadgetGuru99
Have you checked your battery health? Itโ€™s essential to know because if itโ€™s low, it could be causing performance issues. Also, what version of iOS are you running and how much storage do you have left? That stuff can totally affect how the phone handles heavy tasks.
Reply to this answer
AndroNerd_77
Iโ€™ve found that if I switch on low power mode, the screen doesnโ€™t black out even during demanding tasks like 3D benchmark tests. When the screen does go black, activating low power mode through Siri seems to bring it back, so maybe thereโ€™s something to that!
Reply to this answer

Add your answer

Answers are reviewed before publication.

Related Discussions