HP 285 Maintenance and Service Guide - Page 125

Statement of Volatility, File > Save Changes and Exit

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C Statement of Volatility HP confirms that business desktop systems contain DDR3 or DDR4 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, contain 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 (8M Bytes) and Super I/O's: masked keyboard ROM (overall 2K Bytes). In addition, these units contain 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: 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. 10. To clear the Setup or Power-On passwords if set, and clear any other settings, power down the computer and remove the AC power cord and the computer hood. 117

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C
Statement of Volatility
HP
confirms
that business desktop systems contain DDR3 or DDR4 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,
contain 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 (8M Bytes) and Super I/O’s: masked
keyboard ROM (overall 2K Bytes). In addition, these units contain 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:
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
.
10.
To clear the Setup or Power-On passwords if set, and clear any other settings, power down the computer
and remove the AC power cord and the computer hood.
117