Maintenance and Service Guide
Questions and answers
1. How can the BIOS settings be restored (returned to factory settings)?
a. Turn on or restart the computer, and then press F10 as soon as the HP logo appears.
b. Select the Main menu, and then select Apply Factory Defaults and Exit.
2. What kind of conguration data is stored on the DIMM Serial Presence Detect (SPD) memory board?
How would this data be written?
The DIMM SPD memory contains information about the memory module such as size, serial number,
data width, speed/timing, voltage and thermal information. This information is written by the module
manufacturer and stored on an EEPROM. There are various third party tools available to read and write
SPD memory.
3. Does the DIMM SPD memory need to be cleared?
The DIMM SPD memory will not be modied during standard operation of the workstation system. It will
not hold any user data or settings. This NVM memory could potentially be vulnerable due to the fact that
it can be modied freely using third party tools. If there is a possibility that the DIMM SPD region has
been tampered with HP recommends either re-writing the DIMM SPD with third party tools or destroying
the DIMM modules.
4. What information does the NIC EEPROM hold?
The only system-specic data that the NIC EEPROM will hold are the system MAC addresses. The other
information in the EEPROM is the LAN settings which are not able to be modied outside of the HP
factory. The NIC EEPROM will not contain user settings or data.
5. Does resetting the CMOS conguration memory return the PC back to factory defaults?
The process of resetting the CMOS will return certain system settings to factory default but will not reset
many of the system data and conguration defaults to their factory settings. To return these system
data and conguration defaults to factory settings, refer to question and answer 1 and follow the
instructions for returning the BIOS settings to factory defaults.
Using HP Sure Start
Select computer models are congured with HP Sure Start, a technology that continuously monitors your
computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start
restores the BIOS to its previously safe state, without user intervention. Those select computer models ship
with HP Sure Start congured and enabled. HP Sure Start is congured and already enabled so that most
users can use the HP Sure Start default conguration. The default conguration can be customized by
advanced users.
To access the latest documentation on HP Sure Start, go to http://www.hp.com/support, and select your
country. Select Drivers & Downloads, and then follow the on-screen instructions.
86 Appendix B Statement of memory volatility