studio display won't update

I am having the same issue change another

I tried to use another macbook pro to update it.

But stuck at preparing step for hours. right now just start updating firmware.

What's I did is just restart mackook pro multiple time.

You can also restart display studio. (unplug power for at least 1 minute)

Well, it's now May 15 and I figured I'd try to update.

Had to update my Mac mini first to 12.3.1 (I think... as you'll see, I don't have access to my Mac Mini at the moment 😉 )

Then tried to update monitor from 15.3 to 15.4. Update ran for a while then failed, got an error message onscreen saying go to support.apple.com/display/restore. That webpage says try to keep the update going by connecting your computer to another display... I only have the one now-bricked display. Called Apple, they said try typing in my admin password since the login screen should have been sitting there working behind that full screen error message. No change. Apple said the only option was to take it to the Apple Store. Took it over there. It's a nice Sunday. They're mobbed, told me I could get in line (virtually) and wait 2 hours. So, now I'm waiting to get a call from them and take the display over there again. Really hope they have the magic wand to get this thing working again. I mean, it's only a display...

Well, I dropped off my 10 day old Studio Display at the Apple Store to see if they can fix it. They said I was the first person they'd ever seen with this issue -- no surprise, it's a monitor that's only been out a few weeks -- and quoted me 3-5 days to fix it, but said it's possible it would be quicker. We shall see.

Well, I'm just following up to say the Apple Store got back to me in a few hours saying they had fixed and updated my monitor to 15.4. Given that Apple released 15.5 only this morning and my problem happened yesterday, maybe I ran into some conflict as the update was being updated. Anyway, I plan to wait a few days and make sure 15.5 is updating without issues for other people before I try it myself.

Updating failed again.... Looks like it's really hard to get updated. Anyone who get updated please share your experience.