I am from Belgium.
There is no connection problem between the rack and the surface. That has nothing to do with the rack. When I switch on the Surface, the screen usually has to light up black with the BIOS program in the background. The screen remains white, the Surface boots normally, everything works only the screen remains white. If I switch the Surface on and off a few times now, it works again. The error occurs only sporadically. Somewhere there is a problem with the boot process between the CPU and the screen. I called the support in Belgium, they don’t immediately know what it could be. Maybe someone knows the problem?