Thank you but yes, I have tried the live CD and the procedure described many times in the manuals but the box is refusing to boot.
In order to exclude that there is something wrong with the HDD I have even changed it and I even wiped the original one using Dban to start from the scratch.
I get absolutely no error messages during the copy/install process and
as soon as I reboot it does not work any more. I mean the box tries to
boot from CD which I have removed according to the manual, then from LAN and then… nothing
Maybe this is related to my hardware ?