My 2nd iMac Pro has died

My second iMac Pro has just died! With exactly the same problem as my first. Has anyone else experienced the same issue?

Everything works fine and performs great for a few weeks, the first iMac Pro around 5 weeks the second 2 weeks.

One day the iMac is powered on and nothing happens, the screen is dead, no apple logo, no OS. I have tried to reset the smc, boot up in safe mode etc. But nothing.

The Mac is hooked up to 2 LG ultra fine 5k displays via thunderbolt 3, a Lacie 6big raid via Thunderbolt 3 and a belkin thunderbolt 2 express dock HD using an official apple thunderbolt 3 to 2 adaptor.

When turned on the drives hooked up cycle and make a noise but the iMac screen does nothing. The LG displays do nothing.

The same setup works fine with my 2017 15 MacBook Pro.

Does anyone have any ideas/help?

Apple solution is just to provide me with a new Mac with a 3-5 week delay but never fully diagnose the problem.