For old versions ILO:
If a ProLiant DL or ProLiant ML series server is power-cycled with a non-working iLO 2 firmware and takes several minutes to display the Power-On Self-Test (POST), perform the following steps to recover iLO 2 to Firmware Version 1.77:
1. Set the iLO 2 Security Override Switch on the system board to the ON position. The location of the switch is printed on a label located on the inside of the hood cover.
2. Power ON the server and boot using the Firmware Maintenance CD version 8.50. The CD ISO image is available for download from the following URL:
http://www.hp.com/go/foundation
3. Use the following key strokes to exit out of HP Smart Update Manager. A command prompt will be displayed over the HP Smart Update Manager window. The command prompt takes approximately 30 seconds to appear:
CTRL + ALT + d + b + x (Keep the CTRL and ALT keys pressed when typing d b x )
4. At the command prompt, navigate to the Firmware Maintenance CD directory containing the supplemental iLO 2 firmware update by using the following command:
bash-3.1# cd mnt/cdrom/compaq/swpackages
5. Use the following command to unload the HPILO module:
rmmod hpilo
6. Use the following command to execute the iLO 2 firmware update in direct mode:
sh CP010541.scexe direct (This parameter requires two dash ( ) characters).
7. Once the iLO 2 firmware upgrade is completed, power OFF the server and set the iLO 2 Security Override Switch on the system board to the OFF position.