Desktop Video 12.9 just bricked my US 4K Mini

The exact thing happened with mine, so it may be the software at fault.

I’ve contacted BM support and we’ll see if they can address this quickly.

The same thing here ! What are the solution for this issue ?

The same thing here ! What are the solution for this issue ?

Force a firmware update, back to 12.8.1 - look at the thread I started called 'How to Unbrick an Ultrastudio' - a little search would have found it easily ; 12.9 is not currently recommended for the Ultrastudio 4K Mini, until BMD offer a fix.

Same here 12.9 update lockup and wont recognise my ultrastudio 4k mini. Un-installed and re-installed 12.8.1 now following and waiting for a fix.

Un-installed and re-installed 12.8.1 now following and waiting for a fix.

I may be misreading you; but if you haven't currently done the fix, then:

look at the thread I started called 'How to Unbrick an Ultrastudio'

Here: viewtopic.php?f=3&t=199428

You can wait for BMD to issue a update fix, but since they haven't even acknowledged a problem, that may be a while.