Ralf_65, which is the current BIOS version of your motherboard? It might need a BIOS update, but I would prefer if you can provide me that information before installing a new BIOS version.
Please let me know if you are able to boot to the operating system using one stick of memory on DIMM #1?
a BIOS update to the latest version available on the support server was the first thing I have done, but without success. Also using only one DIMM in slot 1 I have tried without success.
Had a phone call with one of your colleagues from the local phone support in Germany yesterday morning and after our discussion his impression was, that it is a hardware deffect. So I will return the board to my local dealer.
Thank you for your support and kind regards