B
Statement of Volatility
HP confirms that Intel-based business desktop HP ProDesk 400 G2.5 Small Form Factor systems contain
DDR3 volatile memory (memory amount depends on the customer configuration). In addition, the
motherboard in the condition originally shipped without subsequent modification or the addition or
installation of any applications, features, or functionality, contains the following nonvolatile memory: Real
Time Clock battery backed-up configuration memory (256 Bytes), DIMM Serial Presence Detect (SPD)
configuration data (256 Bytes per module, 128 Bytes programmable), Serial Peripheral Interface (SPI) ROM
for System BIOS (16M Bytes) and Super I/O’s: masked keyboard ROM (overall 2K Bytes).
HP ProDesk 400 G2.5 Small Form Factor models include a Trusted Platform Module (TPM) that contains 16K
Bytes of non-volatile memory for user data. The volatile memory will not hold any user data once power has
been removed for 30 seconds or longer.
The following procedure shows the steps that should be taken to restore the Non-Volatile memory found in
the Intel-based HP ProDesk 400 G2 Small Form Factor systems.
1.
Download the latest BIOS (system ROM) from the HP website.
2.
Follow the instructions to flash the BIOS that are found on the website.
Flashing the BIOS will reset it back to factory settings.
3.
Turn on the system, and while system is powering on, and after the HP splash screen, press the
F10
key
to enter BIOS setup screen.
4.
Select
Security > System Security
from the main menu. If the Embedded Security Device Support
option is set to “Disable”, skip to step 7.
5.
To erase all security keys from the TPM:
Under
Embedded Security Device
in the
System Security
menu, configure
Reset to Factory Settings
to
Reset
.
NOTE:
Although the TPM security keys will be cleared, data in the non-volatile memory indices may
not be. Data stored in these indices should not contain security sensitive information. If an application
locks down and secures the non-volatile indices, these indices cannot be cleared.
6.
Press
F10
to accept changes.
7.
To clear the secure boot key database:
a.
Enter the F10 setup utility.
b.
Go to the
Security
menu.
c.
Select
Secure Boot Configuration
.
d.
In the
Key Management
section, select
clear Secure boot keys
.
e.
Use space key to select
clear
.
f.
Press the
F10
key to accept changes.
g.
From the main menu select
File > Save Changes and Exit
.
8.
If the Ownership Tag or Asset Tag is set, manually clear it under
Security > System Ids
.
9.
Select
File > Save Changes and Exit
.
124 Appendix B Statement of Volatility
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