hi
in your early bootup screen all devices should be Enabled
DF0 PRIORITY 5
DF1 PRIORITY -10
CC0 PRIORITY 3
HD0 PRIORITY 0 = Worknbench
HD1 onwards NOT BOOTABLE eg work- games etc
have you made sure your workbench partion is ticked bootable. ( in hd toolbox )
if all the above are correct then it sounds like your hard drive is on its way out ie not spinning up.
unless someone can think of anything else to add??