Help: iMac Pro 2017 won't boot

Hello everyone,

Out of the blue, my 2017 iMac Pro stopped booting. The Apple logo appears, it progresses to about 50% (within a minute), and then it just stops without any further action.

When I try to boot in Safe Mode (by holding Shift), nothing changes. Attempting to boot with Command + V (Verbose Mode) causes it to hang at a certain point (see the attached photo).

Here’s what I’ve done so far:

1. Reset the SMC and NVRAM.

2. Checked and repaired the disk using Disk Utility (twice).

3. Reinstalled macOS to the current version (the reinstallation completes successfully, but the system still doesn’t boot).

4. Ran Apple Diagnostics three times, which supposedly should reveal any hardware issues—everything came back normal.

The screen works fine, sound works, bluetooth devices (mouse, keyboard) work too, recovery mode starts without any problems.

I’m completely at a loss as to what the problem could be and how to fix it. Visiting an Apple Store isn’t an option (there’s none in my country), and I’m hesitant to take it to a dubious repair service. I’d appreciate any insights into what might be causing this issue or any other ways to gather more information on why this is happening and how to resolve it.