It appears that its passing from the hardware to the OS since its giving you a Linux error message. I would reduce it down to the minimum to POST and see if it gives you any hardware errors prior to handing off to the OS. One DIMM in the first slot, 1A, disconnect the CD drive, and the hard drives. Record any errors. If no errors, then connect the CD drive first, and try to boot to a CD without the drives being connected.
Regards,