Questions And Answers - HP EliteBook 840 G9 Maintenance And Service Manual

Table 11-1 Troubleshooting steps for nonvolatile memory usage (continued)
Nonvolatile
memory type
802.11 WLAN
EEPROM
Camera (select
products only)
Fingerprint
reader (select
products only)

Questions and answers

Use this section to answer your questions about nonvolatile memory.
1. How can the BIOS settings be restored (returned to factory settings)?
IMPORTANT:
question and answer 6 for steps to securely erase information.
The restore defaults feature does not reset the Custom Secure Boot keys. See question and answer 7 for
information about resetting the keys.
a. Turn on or restart the computer, and then quickly press esc.
b. Select Main, and then select Apply Factory Defaults and Exit.
c. Follow the on-screen instructions.
d. Select Main, select Save Changes and Exit, and then follow the on-screen instructions.
2. What is a UEFI BIOS, and how is it different from a legacy BIOS?
The Unified Extensible Firmware Interface (UEFI) BIOS is an industry-standard software interface between
the platform firmware and an operating system (OS). It replaces the older BIOS architecture but supports
much of the legacy BIOS functionality.
Amount (Size) Does this
memory
store
customer
data?
4 kilobits to 8 No
kilobits
64 kilobits No
512 KB flash Yes
The restore defaults feature does not securely erase any information on your hard drive. See
Does this What is the
memory purpose of
retain data this memory?
when
power is
removed?
Yes Stores
configuration
and
calibration
data.
Yes Stores camera
configuration
and firmware.
Yes Stores
fingerprint
templates.
How is data entered into How is this memory
this memory? write-protected?
802.11 WLAN EEPROM A utility must be used
is programmed at the for writing data to this
factory. Tools for writing memory and is typically
data to this memory are not made available to
not made public. the public unless a
firmware upgrade is
necessary to address a
unique issue.
Camera memory is A utility must be used
programmed using a for writing data to this
utility from the device memory and is typically
manufacturer that can be not made available to
run from Windows. the public unless a
firmware upgrade is
necessary to address a
unique issue.
Fingerprint reader memory Only a digitally signed
is programmed by application can make
user enrollment in the call to write to the
HP ProtectTools Security flash.
Manager.
Questions and answers 111