Ik heb de oplossing gevonden en het werkt:
adding "nomodeset" in boot options from the live CD helped.
but I installed 9.10 with the alternative CD, which produced a blank screen after installation as well. here I added the "nomodeset" in grub boot parameter list in the line starting with "linux "
then I added that "nomodeset" in /boot/grub/grub.cfg at the respective place (as well for the recovery mode)