iPhone 12 pro max keeps dimming

I have the iPhone 12 Pro Max and it constantly dims. I made sure the Automatic button was off, it still dims. I went to answer the phone and it had dimmed itself down to an almost completely dark screen. I am constantly having to reset the brightness back to where I can see the screen. Any "bright" ideas?

iPhone 12 Pro Max, iOS 14

Posted on Nov 24, 2020 8:04 PM

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Posted on May 25, 2021 9:10 AM

So.. I had my apple appointment yesterday, I made sure to video the screen dimming too before I went in, I showed them the videos and explained the issue I was having, to which they admitted was very strange, they said it’s most like software based to which I agreed, but i said, what are you going to do about it, to which they responded, there’s nothing we can do, other than try a screen replacement, so I said go ahead. Now, to do the screen replacement they have to plug the device into a diagnostic machine which will look for a fault and then allow them to do a repair, so they did this, and to both mine and the employees surprised, there were 5 faults with the device! It failed the screen test, the face I.D test, ambient lighting test and two other which I forget, but this meant that they couldn’t do a screen replacement as there were many more issues, so their solution… they straight up replaced my device there and then in the shop! I was gob smacked at this point as usual you’d hear horror stories of how they will blame you and send you away! So far it’s been 24hrs, no screen dim! I’ve even done the things I did before to make it happen, and nothing! So for now, I am happy, I hope this device continues to perform correctly and if I do experience any issues I will be sure to note them here!

my advise, video your issue on another device and head to your nearest apple store!

396 replies

Aug 8, 2022 2:04 AM in response to mpampoulas

The solution is quite simple. It’s the heat. Buy a silicon case. This material conducts heat away from the phone and into the environment nearly as quickly as water .


Silicon is used in electronic to conduct heat away efficiently. Most cases insulate therefore the only surface to conduct the heat away is the screen, which then has a temperature sensor which causes the dimming problem.


hope this helps

Jul 4, 2023 4:29 AM in response to Chloebean1604

Unfortunately, the issue still exists with the 13Pro too. Take it to the beach and it's as good a mirror because you cannot see the display. I had a Samsung Galaxy for a bit and had ZERO problems with the display dimming (and actually a much better display than iPhone). I just couldn't stand the Android iOS so came back to iPhone for another chance. Still the same old issues with the unit dimming due to internal heat. Why Apple doesn't go into the think tank and try to rectify this is the $64,000 question.

Dec 2, 2020 8:16 PM in response to Brian_P7

Yes to all. It didn't matter what I tried, it would constantly dim. I'm returning the phone anyway so not fooling with it. I'm waiting for the shipping label to arrive. For some reason, it's being slow mailed to me. The 12 pro max keeps breaking down with the hearing aid feature too so it's not worth the money. AND the only reason I was updating was for a better camera, but it sucks as much as the iPhone 8 Plus that I have. Technically, there is nothing new with the iPhone 12 pro max. I don't mean to sound like I'm trolling, I'm just being honest. It was a total let down.

Jan 5, 2021 8:59 AM in response to rjm4261

I am on my 2nd iPhone 12 Pro Max. I am having the same issues, mainly continuing auto dimming. On my second phone I set it up without using iCloud to restore. I set up brand new and I am still having overheating issues, slow to charge, battery drain, speaker issues and the auto dimming. If I were able to go into an Genius Bar I would, but with COVID raging I cannot. I also don’t want to be mailed back a refurbished phone... I guess I have to wait until there is a fix... I miss my 11 Pro Max 😞

Apr 10, 2021 5:23 PM in response to Krypto909

This is actually getting ridiculous now! My phone can’t seem to hack even looking through pictures, scrolling Instagram, or even playing a simple 1080p YouTube video! My flash has been unusable for the majority of the day as my ‘iPhone is to hot’. And why is there no response from Apple about this?? Why can’t I charge my phone without it getting hot? And no I’m not using it at the same time and I really hate being told it’s due to the 20 watt charging, 20 watt charging is nothing special, in-fact it’s behind the industry standard these days and yet the phone still can’t handle it! My screen was practically black when I picked it up after 30 minutes of charging, the frame was extremely hot and as I said the flash was simply unavailable to use. I’ve never had a phone that requires the screen to auto dim with auto brightness off due to its inability to control heat. Apple needs to address this!

Apr 24, 2021 6:49 PM in response to rjm4261

Same problem. Very annoying and very unsafe, especially when using map app and the screen goes very dim or even totally black. When it goes black I can’t restart my device to regain control functionality because the black screen is unresponsive and there is no way to shut down. I literally had to wait 3 days for the battery to die before it reset itself when I plugged in the charger. I’ve been in constant contact with Apple phone reps, 2 store visits to reboot the iOS from their own computer, and they still act like it could never happen. Yet here we all are 1,000’s of us doing nothing but talking to each other on this and many other similar threads while Apple keeps telling the public they’re the sliced bread of device producers. I think a class action might be in order if iOS 14.5 doesn’t fix it.

Apr 28, 2021 12:31 PM in response to rjm4261

Hello, I do not have a solution. But I do have an interesting discovery. My iPhone 12 Pro Max went totally black while driving using the maps app. I almost hit another car trying to restore the screen, missed my exit. So while sitting in the grass cooling off I started trying different really odd things to see what might be causing this screen glitch in Apple’s flagship iPhones. Out of pure curiosity I clicked to make a screenshot of the black screen - something I haven’t noticed anyone else here tried yet. And… voila! The picture that was saved to my phone was in FULL BRIGHTNESS. There is definitely a huge software glitch in these devices! I have a store appointment Monday morning May 3rd to replicate my results because the Apple chat rep says “no way that can happen”. Stay tuned…

May 4, 2021 4:49 AM in response to Acethepaceman

WARNING!! APPLE DOES NOT SUPPORT THEIR IPHONE 12'S OVERHEATING ISSUE BECAUSE THEY DONT KNOW HOW TO FIX IT.


All disabled: It's not the True Tone feature. It's not the auto-brightness. It's not the assessability brightness.


It is the Iphone12. Made to over-heat constantly. Better to find another company to buy a phone. Return it is the only thing you can do.



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iPhone 12 pro max keeps dimming

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