Post a boot log - that'll help identify the problem.

It is most likely that you have a dry solder joint on the IDE header on the mainboard. I'd need to bring the player in for service if that is the case.You might also have a failed drive. Try just one drive at a time. Remember to remove the slave jumper when trying the second drive and also that the second drive doesn't have any software installed, but you'll know if it is working from the boot log.