HP 255 G7 User Manual

5 Removal and replacement procedures for Customer Self-Repair parts ............................................................. 27
Preparation for disassembly ............................................................................................................................... 27
Component replacement procedures .................................................................................................................. 27
Optical drive ....................................................................................................................................... 28
6 Removal and replacement procedures for Authorized Service Provider parts ................................................... 30
Component replacement procedures .................................................................................................................. 30
Bottom cover ..................................................................................................................................... 31
Battery ............................................................................................................................................... 33
Memory .............................................................................................................................................. 35
Hard drive .......................................................................................................................................... 37
Solid-state drive ................................................................................................................................ 39
Solid-state drive bracket and connector board ................................................................................ 40
WLAN module .................................................................................................................................... 42
Hard drive connector board ............................................................................................................... 43
USB/card reader board ...................................................................................................................... 44
TouchPad button board ..................................................................................................................... 45
TouchPad module .............................................................................................................................. 46
Fan ..................................................................................................................................................... 48
Heat sink assembly ........................................................................................................................... 49
Display assembly ............................................................................................................................... 53
System board .................................................................................................................................... 62
Speakers ............................................................................................................................................ 64
Power connector cable (DC-in) .......................................................................................................... 65
Top cover with keyboard ................................................................................................................... 66
7 Computer Setup (BIOS), TPM, and HP Sure Start ............................................................................................. 67
Using Computer Setup ......................................................................................................................................... 67
Starting Computer Setup .................................................................................................................. 67
Navigating and selecting in Computer Setup ................................................................................... 67
Restoring factory settings in Computer Setup ................................................................................. 67
Updating the BIOS ............................................................................................................................. 68
Determining the BIOS version ......................................................................................... 68
Downloading a BIOS update ........................................................................................... 68
Changing the boot order using the f9 prompt .................................................................................. 69
TPM BIOS settings (select products only) ........................................................................................................... 69
Using HP Sure Start (select products only) ......................................................................................................... 70
8 Using HP PC Hardware Diagnostics ................................................................................................................ 71
Using HP PC Hardware Diagnostics Windows (select products only) ................................................................. 71
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HP 255 G7 Specifications

General

Form factor	Clamshell
Product type	Laptop
Product color	Black
Country of origin	China
Panel type	SVA
Color gamut	45 %
LED backlight	Yes
RGB color space	NTSC
Display diagonal	15.6 \
Anti-glare screen	Always gives an optimal view, even in direct sunlight.
Display brightness	220 cd/m²
Display resolution	1366 x 768 pixels
Native aspect ratio	16:9
sRGB coverage (typical)	67 %
Display diagonal (metric)	39.6 cm
Memory slots	1x SO-DIMM
Internal memory	4 GB
Memory clock speed	1866 MHz
Memory form factor	SO-DIMM
Internal memory type	DDR4-SDRAM
Maximum internal memory	- GB
Memory layout (slots x size)	1 x 4 GB
HDD speed	7200 RPM
HDD interface	SATA
Storage media	HDD
Optical drive type	DVD±RW
Total storage capacity	500 GB
Compatible memory cards	SD, SDHC, SDXC
Number of HDDs installed	1
Discrete graphics card model	Not available
On-board graphics card model	AMD Radeon R4
On-board graphics card base frequency	686 MHz
Number of built-in speakers	2
Antenna type	1x1
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Bluetooth version	4.2
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
WLAN controller model	Realtek RTL8821CE
Ethernet LAN data rates	10, 100, 1000 Mbit/s
WLAN controller manufacturer	Realtek
HDMI version	1.4b
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity	0
Pointing device	Trackpad
Operating system architecture	64-bit
Sustainability certificates	ENERGY STAR
AC adapter power	45 W
Battery weight	180 g
Battery capacity	41 Wh
Number of battery cells	3
HP segment	Business
HP speaker type	HP Dual Speakers
Processor cache	1 MB
Processor model	A6-9225
Processor family	AMD A6
Processor threads	4
Processor frequency	2.6 GHz
Processor cache type	L2
Processor lithography	28 nm
Processor manufacturer	AMD
Processor boost frequency	3 GHz
Thermal Design Power (TDP)	15 W

Weight and Dimensions

Depth	246 mm
Width	376 mm
Height	22.5 mm
Weight	1780 g