Macbook Pro 16 M1 2021 - Stuck in boot loop, power button hold not working

SOLVED. It was indeed the Display and Lid Angle Sensor - either/or - it is repaired and coming home to me tomorrow.

Only bummer, they could have left the data alone had we known. I had a back-up but it would have saved me the time on a restore and then data merge from my loaner MacBook (my wife's, thanks dear).

I suspect the lid angle sensor, but due to how apple normally serialize their components to prevent third party from fixing them, re calibration may be needed if the LID angle sensor is replaced, I will try and replace it first to see if it fix my own issue too, thank you for updates.

Yeah, interested to hear. I wouldn't think the display module had anything to do with this, this is a good experiment and might save people some time and a significant amount of money - the Display module was pricey, especially for an undamaged exchange.

Just got this issue yesterday, not able to go into any recovery/safe modes. Revive failed as well. Like others, I’m able to see Apple logo with flashlight on as the laptop infinitely boots and chimes.

Apple Store said plan of action is:

1) Attempt a revive (I already know this won’t work)

2) Attempt a restore (I’d rather not try this since I have maybe 2% of stuff that is not backed up to icloud like some old .RAW files I’d rather keep if I can)

3) “Fix it” for $748… whatever that means.

If it really is the same display module issue.. sounds like that can be fixed without wiping (AND wiping won’t even do anything)

Would rather they do some diagnostics and try this route before unnecessarily wiping but the guy seemed pretty adamant about trying the restore first. Decided to just bring my laptop home for now.

Might see if I can get an associate who is less wipe-trigger-happy and more “diagnostics” first.

Agreed, this is a hardware issue, not OS related. If you do not attempt a restore or change out the MLB, you'll be able to keep your data.

I believe the problem is either the LCD Screen Angle Sensor and/or the Display. My cost to repair was around your quote.

If you want to save your data and to keep your M1 MBP, just pay the $748. If you later decide you don't want your MBP and want to upgrade, you can trade-in at close to $600 - costing you $148 to save your data.

My 2 cents.

Asked and they said trade-in is worth $0 in its current state.

Sent for repair. Issue was determined to be as you predicted, both Display + Lid Angle Sensor were replaced for $748.

Unfortunately, they also performed a clean install of MacOS for whatever stupid reason, so data was wiped.

Again majority of my stuff was in iCloud but still bummed about the things I did lose that were in local pictures/movies/music/downloads/home directories.

Also really stupid that a broken lid angle/display means that MacBook can't boot when lid is closed, display is off, and connected to an external monitor.

I have tried many approaches too, but none worked, I had to open the bottom case to take a look, but seems everything is intact and no traces yet

What do you think could have happened

I unplugged the battery connector and other flex connector cables and recoupled but no luck yet

Can you see the display/ video cable from that view?

Yes, I unplugged the display cable, cleaned the port with soft brush, I was able to identify the port using one of the ifixit tutorial

Super helpful, Ok, I'll try all of this too and report.

Let's wait for your update then

Hi, just following up on this thread, is there any update yet

Ok, please keep us updated