On power up the DEL key will get you into the BIOS which reports itself as:
Phoenix - Award WorkstationBIOS CMOS Setup Utility
In the Linux log file I find:
DMI: SAMSUNG ELECTRONICS Co., Ltd NETWORK MONITOR/SCNE-R69AA3-10, BIOS 6.00 PG 04/29/2010
Under Advanced BIOS Features you have the ability to set the First/Second/Third Boot Device Priority. The options are the usual list of:
This BIOS is one where you need to pick the Hard Disk option in order to boot from a USB flash drive. There is a separate entry Hard Disk Boot Priority which, with a 8GB SanDisk USB flash drive plugged in, gives me:
1. USB-HDD0 : SanDisk 2. Ch0 M. : FDM4GB V3.P0C 3. Bootable Add-in Cards
As always use the +/- keys to reorder them to suit.