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HP t820 Maintenance & Service Manual: Appendix I Statement Of Volatility

Hp t820 flexible thin client maintenance & service guide.
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I
Statement of Volatility
HP confirms that Intel-based HP t820 Flexible Thin Client 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, 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 (16M
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 lists steps that should be taken to restore the Non Volatile memory found in the Intel-based
HP t820 Flexible Thin Client systems.
1.
Download the latest BIOS (system ROM) from the HP website.
2.
Follow the instructions for flashing the BIOS.
3.
Shut down the computer.
4.
Power on the computer and enter the Computer Setup Utility as follows:
a.
Press the
bottom of the screen.
b.
Select Computer Setup (F10) from the Startup Menu list.
5.
From the main menu, select Security, and then select System Security. In the menu, if the
Embedded Security Device Support option shows Disable, skip to step 8.
6.
To erase all security keys from the TPM:
Under Embedded Security Device in the System Security menu, set Reset to
Factory Settings to Reset.
NOTE:
may not be cleared. 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.
7.
Press the
8.
To clear the secure boot key database.
Esc
key when the "Press the ESC key for Startup Menu" prompt appears near the
Although the TPM security keys are cleared, data in the non-volatile memory indices
F10
key to accept changes.
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