Sorry, Sam460EX was a typo, I had the CR model in mind. You're right, it's comparable to the Sam460cr with minor changes like the form factor for allowing double slot GPU's, with the recent Uboot preinstalled and a slighty higher CPU clock (1.14 GHz).

I am happy to get assistance and will provide more information like the full boot log as soon as I can.

About the white screen, I get no text output on the monitor at all. All that happens is that I see the Acube logo while I see is the boot sequence on the serial terminal and when the "booting..." message appears on the terminal, the logo vansishes simultaneously.

I can restart and enter CLI to set some ENVVARS (for the SATA adapter) or the Uboot menu to change boot devices and I am able to install another infamous OS which claims to be an AmigaOS successor...

[ Edited by Skygecko 21.06.2023 - 17:50 ]