Thanks chookman and Zorg but I have done that already.
I have cleared cmos, several times but with no results. I moved the cmos jumper for 10 seconds, powered on and no change. Again cleared cmos for 10 minutes and no change. I guess my next step will be to get another sata optical drive and see if it will boot from it. I find it hard to believe that the drives failed at the same time but that will be one more step in troubleshooting the problem.