I have a similar issue, however i have installed Ubuntu to the Hard Drive successfully and still booting from the main HD in bay 1 (I know you cannot boot from bay 2) still has the "Operating System not found..." Error after posting. I have done a reflow on the GPU which has been one of many DV9000's i have also reflow'ed, my success rate on those so far has been 10/10. I think this MAY be an issue with the bios? Grub usually flawless, im thinking that the bios is not looking for the boot sector correctly.