No Boot Device Found

I've had this kind of thing before on anothe machine.  In this case it isn't so dire as much as it is a nuissance.

When booting, it beeps and displays the typical "No Boot Device Found - F1 to restart, F2 to configure ..."

If I press F1, it will boot up.  If I press F2 and just exit without making any changes or saving, it will also boot up, and if I have the Windows CD in the drive, it will boot up on its own.  I just don't know why it won't boot normally on its own.

I have two disks making one logical volume.  The LUN is defined as the boot device.  All appears to be right in the boot up sequence.  Thoughts?  Thanks!