HP EliteBook 850 G4 User Manual

Identify the issue
1. Understand the issue
It is important to understand the issue that occurred, including related symptoms. It helps to understand the
basic computer boot-up sequence as well as the failure itself. The boot-up sequence and associated failures
are described below.
Boot up sequence
The computer performs several steps after you press the power button or restart the computer.
It is important to understand where in the boot-up sequence the symptoms occur. The following table lists
the phases of the boot-up sequence and explains the symptoms that may occur in each phase. For example, a
blue screen error (BSOD) often occurs during the performance phase.
Table 8-2 Boot-up sequence
Power-on After power button is pressed, the computer boots after all internal power rails (i.e., 5V, 3.3V) are stable.
Conrm that power lights are on fan is spinning.
Next step: If the computer experiences a power-on issue, see “Verify Power Good (Troubleshooting) lights” in
No Power on page 101.
Common issues: all lights are o; troubleshooting lights are on; does not boot; video is absent.
POST (UEFI/BIOS) Power-On Self-Test (POST) veries that hardware components (processor, hard drive, memory, etc.) are
functional. When POST is complete, the HP logo displays briey and then disappears.
If there are errors, the computer may exhibit blinking lights and POST error messages
Common issues: lights blink, error message appears, hangs.
Performance
(operating system)
System boots to operating system, and Windows logo screen appears..
Common issues: hangs (lock up/freezes), blue screen, video distorted, driver conict, slow performance,
display issue (dead pixel), I/O issue (no speaker sound), wireless/audio unavailable, noise.
See Analyze the issue on page 87 table below for detailed troubleshooting information).
Failure classication
Failure classication is a breakdown of dierent types of failures and symptoms that could occur during the
boot-up sequence. Table 3 and table 4 represent the failure classication for common notebook failures.
Table 3 categorizes failures by the boot-up sequence.
1. Power-on: Common issues are No Power, Recycle/Reboot, etc.
2. POST: Common issues are No Boot (have power), Light Flash or Diagnostics Error.
3. Performance: Common issues are Intermittent Loss of Power, Blue Screen, Hang, etc. In many cases,
issues may be identied and associated with a particular hardware (i.e., display, storage).
Table 4 categorizes failures by hardware.
4. Display
5. I/O devices (Input/Output)
6. Storage
7. Mechanical
84 Chapter 8 Troubleshooting guide

HP EliteBook 850 G4 Specifications

General

Form factor	Clamshell
Product type	Laptop
Product color	Silver
Country of origin	China
Bus type	OPI
Stepping	H0
Tjunction	100 °C
Processor cache	3 MB
Processor cores	2
Processor model	i5-7200U
System bus rate	4 GT/s
Processor family	Intel® Core™ i5
Processor socket	BGA 1356
Processor threads	4
Processor codename	Kaby Lake
Configurable TDP-up	25 W
Processor frequency	2.5 GHz
Processor cache type	Smart Cache
Configurable TDP-down	7.5 W
Processor lithography	14 nm
Processor manufacturer	Intel
PCI Express slots version	3.0
Processor boost frequency	3.1 GHz
Processor operating modes	64-bit
ECC supported by processor	No
PCI Express configurations	1x2+2x1, 1x4, 2x2, 4x1
Thermal Design Power (TDP)	15 W
Configurable TDP-up frequency	2.7 GHz
Configurable TDP-down frequency	0.8 GHz
Maximum number of PCI Express lanes	12
Numeric keypad	Yes
Pointing device	Touchpad
Memory slots	2x SO-DIMM
Internal memory	8 GB
Memory clock speed	2133 MHz
Internal memory type	DDR4-SDRAM
Maximum internal memory	32 GB
Memory layout (slots x size)	1 x 8 GB
SSD capacity	The Solid State Drive's storage capacity in Gigabytes.
SSD interface	PCI Express
Storage media	SSD
Total storage capacity	256 GB
Compatible memory cards	SD, SDHC, SDXC
Number of SSDs installed	1
Display diagonal	15.6 \
Native aspect ratio	16:9
On-board graphics card ID	0x5916
Discrete graphics card model	Not available
On-board graphics card model	Intel® HD Graphics 620
On-board graphics card family	Intel® HD Graphics
On-board graphics card OpenGL version	4.4
On-board graphics card base frequency	300 MHz
On-board graphics card DirectX version	12.0
On-board graphics card dynamic frequency (max)	1000 MHz
Battery capacity	51 Wh
Battery life (max)	14.7 h
Number of battery cells	3
AC adapter power	45 W
Wi-Fi standards	802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	4.2
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Charging port type	DC-in jack
USB 2.0 ports quantity	0
Sustainability certificates	ENERGY STAR
Processor code	SR2ZU
Processor ARK ID	95443
Processor package size	42 x 24 mm
Supported instruction sets	AVX 2.0, SSE4.1, SSE4.2
Intel Identity Protection Technology version	1.00
Intel Stable Image Platform Program (SIPP) version	0.00
Intel segment tagging	Home Office, Small Business
HP segment	Business
HP Management tools	HP Driver Packs, HP SoftPaq Download Manager (SDM), HP System Software Manager (SSM), HP BIOS Config Utility (BCU), HP Client Catalog, HP Management Integration Kit, HP Device Access Manager, HP BIOSphere, HP Sure Start, HP Client Security
HP Software provided	HP ePrint Driver+JetAdvantage, HP Hotkey Support, HP Noise Cancellation, HP Workwise, HP Velocity
Harmonized System (HS) code	84713000

Weight and Dimensions

Depth	257.7 mm
Width	383.6 mm
Height	19.4 mm
Weight	1840 g