Apple Studio Display Powers Down & Out Intermittently

My Apple Studio Display connected to MacMini M4 (Studio Display, light use / 2 years old) has intermittent power shutdowns. It might work for several days and then - Powers off completely. Once it shuts down it will not power up for hours - even overnight sometimes will not reset the power supply. There have been 5 Studio Displays come back to our small Apple repair shop on the island. Sounds like an issue to me. Yes, I have changed the Thunderbolt cable, the wall plug, and running the latest version of Sequoia - etc. etc. and ran it on two mac mini's over an extended period before it surfaced. It's an issue. Has anyone had the power supply replaced that fixed the problem or is it the dreaded logic board? (If you haven't had the problem skip "never had the problem" responses, it takes up space and doesn't help anyone.)