Non-Volatile Memory Usage - HP mt41 Maintenance And Service Manual

i. Reboot the system. If the system has a Trusted Platform Module (TPM) and/or fingerprint
sensor, one or two prompts will appear. One to clear the TPM and the other to Reset
Fingerprint Sensor; press
j. Remove all power and system batteries for at least 24 hours.
2. Remove and retain the storage drive or clear the contents of the drive.
Clear the drive contents by using the BIOS Setup Secure Erase command option, or by using a
third party utility designed to erase data from an SSD. To run Secure Erase, follow these steps:
a. Enter BIOS Setup by powering on the system, and then pressing
the bottom of the display.
b. Select the Security menu and scroll down to the Utilities menu.
c. Select Hard Drive Tools.
d. Under Utilities, select Secure Erase, and then select the desired hard drive.

Non-volatile memory usage

Non Volatile Amount (Size)
Memory Type
Real Time Clock 256 Bytes
(RTC) battery
backed-up
CMOS
configuration
memory (CMOS)
Controller (NIC) 64 Kbytes (not
EEPROM customer
accessible)
Keyboard ROM 64 Kbytes (not
customer
accessible)
DIMM Serial 256 Bytes per
Presence Detect memory
(SPD) module, 128
configuration Bytes
data programmable
(not customer
accessible)
90 Chapter 9 Statement of Volatility
F1 to accept or
Does this Does this
memory memory
store retain data
customer when
data? power is
removed?
No Yes
No Yes
No Yes
No Yes
F2 to reject.
What is the How is data input into
purpose of this memory?
this
memory?
Stores system Using the F10 Setup utility
date and time or changing the M
and limited Windows date & time.
keyboard
controller
data.
Store NIC Using a utility from the NIC
configuration vendor that can be run
and NIC from DOS.
firmware.
Stores Programmed at the
firmware code factory. Code is updated
(keyboard, when the system BIOS is
mouse, & updated.
battery
management)
.
Stores Programmed by the
memory memory vendor.
module
information.
F10 when prompted near
How is this memory
write protected?
This memory is not
write-protected. HP
recommends password
protecting the F10
Setup utility.
A utility is required to
write data to this
memory and is
available from NIC
vendor. Writing data to
this ROM in an
inappropriate manner
will render the NIC
non-functional.
A utility is required for
writing data to this
memory and is
available on the HP
website. Writing data to
this ROM in an
inappropriate manner
can render the PC non-
functional.
Data cannot be written
to this memory when
the module is installed
in a PC. The specific
write protection method
varies by memory
vendor.