Don't ask me why and how but it actually solved the problem ; ).
could have been the AHCI CD/DVD Boot Timeout option in the bios, mine was set to 15 seconds per device, two DVD drives meant a 30 second delay during boot (black screen, flashing cursor at the top left of the screen), you could try re-enabling AHCI (it should actually make hard drive performance faster) and remove any DVD drives from the boot order in the bios (I just have my primary HDD and thats it), this will negate the AHCI CD/DVD Boot Timeout delay.