HP dx7400 - Microtower PC Service & Reference Manual page 44

CAUTION:
order in the Computer Setup (F10) Utility lists the USB device before the hard drive, the computer can
be booted from a USB flash media device. Otherwise, a bootable diskette must be used.
1. If there are any PCI cards in the system that have SCSI, ATA RAID or SATA drives attached, turn
off the computer and unplug the power cord.
CAUTION:
2. Open the computer and remove the PCI cards.
3. Insert the USB flash media device into one of the computer's USB ports and remove all other USB
storage devices except USB diskette drives. Close the computer cover.
4. Plug in the power cord and turn on the computer.
5. As soon as the computer is turned on, press
Computer Setup. Press
NOTE:
press F10
6. Go to Advanced > PCI Devices to disable both the PATA and SATA controllers. When disabling
the SATA controller, note the IRQ to which the controller is assigned. You will need to reassign the
IRQ later. Exit setup, confirming the changes.
SATA IRQ: __________
7. Insert a bootable DOS diskette with FDISK.COM and either SYS.COM or FORMAT.COM into a
diskette drive and turn on the computer to boot to the DOS diskette.
8. Run FDISK and delete any existing partitions on the USB flash media device. Create a new partition
and mark it active. Exit FDISK by pressing the
9. If the system did not automatically restart when exiting FDISK, press
DOS diskette.
10. At the A:\ prompt, type FORMAT C: /S and press Enter. Format will format the USB flash media
device, add the system files, and ask for a Volume Label.
11. Press Enter
12. Turn off the computer and unplug the power cord. Open the computer and re-install any PCI cards
that were previously removed. Close the computer cover.
13. Plug in the power cord, remove the diskette, and turn on the computer.
14. As soon as the computer is turned on, press
Computer Setup. Press
15. Go to Advanced > PCI Devices and re-enable the PATA and SATA controllers that were disabled
in step 6. Put the SATA controller on its original IRQ.
16. Save the changes and exit. The computer will boot to the USB flash media device as drive C.
34 Chapter 4 Desktop Management
Some older PCs may not be bootable from a USB flash media device. If the default boot
The power cord MUST be unplugged.
Enter to bypass the title screen, if necessary.
If you do not press F10
when the monitor light turns green to access the utility.
for no label or enter one if desired.
Enter to bypass the title screen, if necessary.
F10 when the monitor light turns green to enter
at the appropriate time, you must restart the computer and again
Esc key.
F10 when the monitor light turns green to enter
Ctrl+Alt+Del to reboot to the