HP EliteBook 745 G2 HP Notebook PC and EliteBook 755 G2 Notebook PC - Maintenance and Service Guide

Non Volatile
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 input into this
memory?
How is this memory
write protected?
Web Camera 64K bit No Yes Store Web Cam
conguration
and rmware.
Using a utility from the
device manufacturer that can
be run from Windows.
A utility is required for
writing data to this
memory and is typically
not made available to the
public unless a rmware
upgrade is necessary to
address a unique issue.
Fingerprint Reader 512kByte Flash Yes Yes Stores
ngerprint
templates.
By enrolling in HP
ProtectTools Security
Manager.
Only a digitally signed
application can make the
call to write to the ash.
Questions and answers
1. How can the BIOS settings be restored (returned to factory settings)?
a. Turn on or restart the computer and press F10 when prompted near the bottom of the display.
b. Select Main, then select Restore defaults.
c. Follow the on-screen instructions.
d. Select Main, save changes and exit, then press Enter.
2. What kind of conguration data is stored on the DIMM Serial Presence Detect (SPD) memory
module? How would this data be written?
The DIMM SPD memory contains information about the memory module such as size, serial number,
data width, speed/timing, voltage and thermal information. This information is written by the module
manufacturer and stored on an EEPROM. This EEPROM cannot be written to when the memory module is
installed in a PC. Third party tools do exist that can write to the EEPROM when the memory module is
not installed in a PC. There are various third party tools available to read SPD memory.
3. Does the “Firmware Hub for System BIOS” contain the BIOS program? Is this chip writable, and if so
how?
The Firmware Hub does contain the BIOS program and is writable. A utility is required to perform the
write function.
4. In some PC systems, the Firmware Hub for System BIOS is a ash memory chip so that updates can
be written by the customer. Is this true for these BIOS chips?
Yes, they are ash memory chips.
5. What is meant by “Restore the nonvolatile memory found in Intel-based system boards”?
This relates to clearing the Real Time Clock (RTC) CMOS memory that contains PC conguration data.
6. Does resetting the CMOS conguration memory return the PC back to factory defaults?
The process of resetting the CMOS will return certain system settings to factory default but will not reset
many of the system data and conguration defaults to their factory settings. To return these system
data and conguration defaults to factory settings, refer to question and answer 1 and follow the
instructions for returning the BIOS settings to factory defaults.
Questions and answers 139