HP ProBook 640 G1, 645 G1, 650 G1, and 655 G1 Notebook PCs - Maintenance and Service Guide
Table Of Contents
- Product description
- External component identification
- Illustrated parts catalog
- Removal and replacement procedures preliminary requirements
- Removal and replacement procedures for Customer Self-Repair parts
- Removal and replacement procedures for Authorized Service Provider parts
- Computer Setup (BIOS), TPM, and HP Sure Start – Windows 10
- Using HP PC Hardware Diagnostics (UEFI) – Windows 10
- Computer Setup
- Windows 8 — Computer Setup (BIOS), MultiBoot, and System Diagnostics
- Windows 7 — Computer Setup (BIOS), MultiBoot, and HP PC Hardware Diagnostics (UEFI)
- Specifications
- Backup and recovery – Windows 10
- Backup and recovery
- Statement of Volatility
- Power cord set requirements
- Recycling
- Index
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?
upgrade is necessary to
address a unique issue.
Webcamera 64K bit No Yes Store Web Cam
configuration
and firmware.
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 firmware
upgrade is necessary to
address a unique issue.
Fingerprint reader 512kByte
Flash
Yes Yes Stores
fingerprint
templates.
By enrolling in HP
ProtectTools Security
Manager.
Only a digitally signed
application can make the
call to write to the flash.
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, and then select Restore defaults.
c. Follow the on-screen instructions.
d. Select Main, Save Changes and Exit, and then press Enter.
2. What kind of configuration 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 flash memory chip so that updates can
be written by the customer. Is this true for these BIOS chips?
Yes, they are flash 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 configuration data.
6. Does resetting the CMOS configuration 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 configuration defaults to their factory settings. To return these
152 Chapter 13 Statement of Volatility