Thank you for helping out here.
Here is the problem description:
- the system starts.
- i press f2 to go into the bios.
- i go to boot manager and select boot to efi.
- the system do not go into the efi shell.
- i have disconnected all media like optical drive, hard disk.
- no change.
However, i can boot from a dos bootable usb stick.
If you have some more questions, feel free to ask.
Thank you for the help.
The jumper did the trick.
Then i have followed all the instructions from the TPS Page 111/170
The issue is resolved now.