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

Ok, have it apart, nothing obvious wrong. Checked each section of the bottom-side of MLB with a USB microscope, no burned, broken or discolored boards or solders.

Disconnected battery (left disconnected for 20 mins). Now re-seating all display connectors (man they are really small!) and re-assembling. I'll report on my first reboot attempt.

(I DID notice that one fan spins less freely than the other, not sure if this is wear/ sticking or by-design.)

When do you think that will be, we have a similar case, but unfortunately I'm in Nigeria, Africa, there is no geniusbar here, the iStore (private company who was recommended by apple) didn't give fast consideration about my issue, I was told I will have to drop it for diagnostic which will take 5 working days and probably it will take additional 15 days to get it repaired if it's what they can handle, it took me several miles before I get to their place and still no tangible help so far.

If you can take yours to the genius bar, maybe you can give a hint on what the issue is

Thanks

I couldn’t get anything to work, firmware restore, usb stick boot, nothing, trying a full restore tomorrow, gave up saving my data. Sigh. Will update if it works and I can restore from my latest Time Machine backup.

Some good news turns-out to be a delay in the repair - my CC gave me an extended warranty but I need to get approval from them before I start the repair. In addition, I think because I am not in the states, things are taking longer. Hoping to start the repair today or tomorrow.

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.

What do you think could have happened

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

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?

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

Thanks for keeping us updated, we hope it comes out well