Okay, so it's not the network booting.
(Network booting could also be sorted out by disconnecting the ethernet cable, and start that way, as far as I know.)
By the way, do you use a stopwatch? When you experiment, the time is always the same to the second?
Hablin :
AHCI CD/DVD boot time out-35
This is something like we are trying to deal. This setting allows a 35 seconds waiting period for the CD/DVD to boot, if there's media in it.
You may want to lower it, and try that way. But in that other forum they said it hadn't helped.
Hablin :
boot configure features
1st boot device-HDD
1-M4-CT128M4S
2nd boot device-CD/DVD: P2-PLDS DVD
Mkay, no USB device is enumerated here.
Under the "2nd boot device" line, don't you have a "Hard Disk Drives" option? No USB devices are recognized in there by any chance?
I found it strange what that person said in that forum (
http://en.community.dell.com/owners-club/alienware/f/3746/p/19353035/19813964.aspx#19813964 ) : he said he disconnected each and every USB device, even the keyboard, and things got only better after he started the computer with PS2 connected keyboard and mouse. And after that he was able to reconnect the USB devices without problem. Strange. (And he has the Area 51, not the Aurora.)
So something may be going on with this long waiting. Lots of frustrated posts in that forum. But the success reports give some hope.
If anything you did so far, hasn't changed anything, you may want to consider contacting official product support now. At least you are familiar with the BIOS now.