HP Dragonfly Folio 13.5 Maintenance and Service Guide - Page 101

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Table 10-1 Troubleshooting steps for nonvolatile memory usage (continued) Nonvolatile memory type Amount (Size) Does this memory store customer data? Does this memory retain data when power is removed? What is the purpose of this memory? How is data entered into this memory? How is this memory write-protected? 802.11 WLAN 4 kilobits to 8 No Yes Stores 802.11 WLAN EEPROM A utility must be used EEPROM kilobits configuration is programmed at the for writing data to and factory. Tools for writing this memory and is calibration data to this memory are typically not made data. not made public. available to the public unless a firmware upgrade is necessary to address a unique issue. Camera (select 64 kilobits No Yes Stores Camera memory is A utility must be used products only) camera programmed using a for writing data to configuration utility from the device this memory and is and firmware. manufacturer that can be typically not made run from Windows. available to the public unless a firmware upgrade is necessary to address a unique issue. Fingerprint 512 KB flash Yes Yes reader (select products only) Stores fingerprint templates. Fingerprint reader memory is programmed by user enrollment in HP ProtectTools Security Manager. Only a digitally signed application can make the call to write to the flash. 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: The restore defaults feature does not securely erase any information on your hard drive. See 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. Questions and answers 95

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Table 10-1
Troubleshooting steps for nonvolatile memory usage
(continued)
Nonvolatile
memory type
Amount (Size)
Does this
memory
store
customer
data?
Does this
memory
retain data
when
power is
removed?
What is the
purpose of
this memory?
How is data entered into
this memory?
How is this memory
write-protected?
802.11 WLAN
EEPROM
4 kilobits to 8
kilobits
No
Yes
Stores
configuration
and
calibration
data.
802.11 WLAN EEPROM
is programmed at the
factory. Tools for writing
data to this memory are
not made public.
A utility must be used
for writing data to
this memory and is
typically not made
available to the public
unless a firmware
upgrade is necessary
to address a unique
issue.
Camera (select
products only)
64 kilobits
No
Yes
Stores
camera
configuration
and firmware.
Camera memory is
programmed using a
utility from the device
manufacturer that can be
run from Windows.
A utility must be used
for writing data to
this memory and is
typically not made
available to the public
unless a firmware
upgrade is necessary
to address a unique
issue.
Fingerprint
reader (select
products only)
512 KB flash
Yes
Yes
Stores
fingerprint
templates.
Fingerprint reader
memory is programmed
by user enrollment in
HP ProtectTools Security
Manager.
Only a digitally signed
application can make
the call to write to the
flash.
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:
The restore defaults feature does not securely erase any information on your hard drive.
See 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.
Questions and answers
95