Apple logo flash at startup

People are not reading the posts before posting there troubles... most answers are already here.

The issue looks to be part of iOS 14.3 and not in the phones hardware as iOS 14.2.x works fine, so Apple should be able to address it with software. It also does not effect the operation of the phone, only reboot which no one should be rebooting much anyways... since the release of iOS 14.4 went golden last week and is coming out this week before this issue was really noted by Apple... I do not believe the patch/fix for this issue will be in this update so we may may have to wait a bit longer for a sub-dot-release 14.4.x shortly after.

Apple senior support advisor told me directly that they will fix this issue... Apple also has a video I sent them showing this issue happening in a support case they have created on this problem.

Its not only booting issue , its entire feedback screen issue .

when device in recovery mode laptop and cable logo is not showing as well as if battery drain the battery and cable logo as well not showing in the feedback screen.

after replacing 6 devices i find out that this issue happens only after 1st full charge.100%

nice one!

I hadn't looked at it that way yet. but you are right indeed about the feedback screen

but about charging to 100% I dont agree: out of the box: no issue. Then I had my iphone fully installed, then rebooted and there was the problem. so not even hung on the charger

My last 2 replaced devices were fine and working normally until full charge happen. Even I tried to charge 50% and was ok after that .

only once reached 100% I rebooted the device then issue is there again.

maybe it’s something else, but I tried everything to find out the reason as the device was fine out of the box

I have the same issue here. Just spoke with Apple Support, they ran a diagnostic for both software and hardware and they found no issue. Hopefully they can come up with a fix on this as this is so bothersome because we know that this should be not normal.

I had the same problem with my iPhone 12 Pro Max. iOS 14.3 came pre installed, I exchanged it yesterday. Thankfully my new one came with 14.2 pre installed; I did the update to 14.3 and it’s still fine. The phone is too expensive to have this problem. FYI, you will not be able to put the phone on recovery mode with it being this way. Forget having to restore anything from iTunes.

Btw, I’m on my 3rd iPhone 12 pro max; the first one had signal issues. My 11 pro max was perfect, I should have kept it.

I just hung up with a Support specialist via chat who had me run a diagnostic on my phone, and finding nothing she could fix, had me visit with a sales specialist. That guy told me that because I traded in an old phone, I had to make an appointment to go to a store to exchange. What a hassle. I've only got a few days left, too as it seems I have 14 days upon receipt of the phone to make an exchange.

Yeah still same problem maybe bcoz apple just recently realized the problem maybe on the nxt update? I went last time to an apple servce center and they said i need to schedule bfore they accomodate me.

I can confirm problem still exists on my 12 pro after the 14.4 update. Really frustrating as mine doesn’t start up 10 seconds after the apple flash. Seems to be totally random when it starts up again! Very disappointed!

Just upgraded to iOS 14.4 and if anything the problem has gotten worse. This is my second iPhone 12 Pro after I returned the first believing it was a defective handset but I’m getting the exact same problem.

When I attempt to switch the phone on I get a bright flash of the apple logo and then the screen goes black again. I have to try several times before I’m able to power up the device successfully.

I really hope this is down to software/firmware and apple can fix it ASAP.

I had the exact same issue when I restored my iPhone 12 pro. The phone got stuck and apple logo kept flashing bright at startup and nothing else would work until I had to force restart and restore it again.

Even though phone worked fine after that but on every restart, apple logo briefly flashed at full brightness and few seconds later normal apple logo would appear and phone would start normally.

I did exchange my phone with a new one and never tried to restore data thereafter. Wonder if apple is considering an update to fix this issue? Seems like a software glitch.

I am very happy that I have found this threat.

I bought an iPhone 12 Pro 512GB (white) with serial F2xxxxxxxxxx last week at German Amazon.

On first start everything worked OK. I turned it off to to do restore later on. At the second power on I have seen this strange behaviour. I restarted the iPhone with a "reset" - same strange behaviour.

I did a "recover" and a "DFU recover" with iOS 14.3 and the issues persists.

Today I called the German Apple Support. The support agent searched the knowledge database for this "logo flash issue" -> no hit.

The agent did a remote diagnostic and the diagnostic indicated -> "no issue found"

Therefore that "no issue were found" the agent told me, that a swap of the device isn't possible - I can just send the device in for repair. :-(

The agent recommended that I return the iPhone to Amazon for a refund and buy another one some weeks later...

Currently Amazon is sold-out therefore I have to wait anyway.

I hope that Apple will find the root cause soon!

My Fiancé and I both got the new IPhone 12 Pro and we both are having this exact same problem!!! It’s annoying. I have been both to AT&T and Best Buy Geek Squard (as they are authorized now to diagnose iPhones. They couldn’t find anything wrong with the phones using apples diagnostic program. They also did a full removal of the software and firmware and the problem still exists... they said now we have to go to apple directly. But since everyone is having this issue it must be an IOS problem! Apple please get back to us and fix this problem. A $1100 phone shouldn’t be doing this.

I am experiencing the same problem. Restored iPhone via iTunes (iOS 14.4) and set as new iPhone. The problem is still there. In addition, the phone charges very slowly on the original MagSafe charger, with 20 watts original charging brick. Could this problem be caused by a MagSafe error?

I have the same issue and tried to solve it by restore and set as new iPhone but problem still occurs. So I tried to contact apple support and they said that many people reported that. I have no idea what they will do to solve this problem since they say that apple genius bar will decide if this is the problem or not.