HP EliteBook 850 G3 User Manual

Mechanical
Fan error message - 90B
Symptoms
Fan error 90B at boot
CAUTION: May lead to system
shutdown, data loss or possible system
damage.
Possible causes
Defective fan; out-of-date BIOS.
●
The system fan is not spinning or not spinning properly (loose connection, fan is stuck
or defective).
●
The temperature inside the case is too high, and the fan cannot spin fast enough to
remove the heat due to an obstruction to air ow.
Troubleshooting steps
General actions
1. Update BIOS and drivers (4. Update BIOS and drivers on page 87) or reset BIOS to
default. BIOS may implement new fan characteristics and updates for other
components.
2. Perform a hard reset (8. Hard reset on page 95). Performing a hard reset can reset
recorded thermal values in memory.
Thermal-related issue
1. Verify thermal condition:
a. Check fan and connection. Reseat fan cable.
b. Be sure that no obstructions or dust are in heat sink fan, n, or vent.
c. Test fan using HP PC Hardware Diagnostics (UEFI) tool (6. HP Hardware
Diagnostics and Tools on page 88). Be sure that the fan is not producing loud
noise and that fan blades spin correctly.
d. Test with a veried working fan.
e. Remove old thermal compound and pads, and replace properly with new pads.
2. Verify thermal solution
▲
Use Thermal Monitor tool (available only to authorized service providers/
technicians) to run stress test (processor and GPU) and verify that thermal
sensors are within limits after thermal condition is serviced.
Note BIOS currently omits fan presence detection to shorten boot time delay less than four
seconds. Therefore, the fan error is generated based on previous boot to operating system
that found system fan error.
Fan often is part of thermal solution, including heat sink, n/ muer, and thermal grease.
Fan replacement requires reboot and fan function verication using HP PC Hardware
Diagnostics (UEFI) tool.
138 Chapter 7 Troubleshooting guide

HP EliteBook 850 G3 Specifications

General

Form factor	Clamshell
Product type	Ultrabook
Product color	Silver
Country of origin	China
Bus type	OPI
Stepping	D1
Tjunction	100 °C
Processor cache	4 MB
Processor cores	2
Processor model	i7-6500U
System bus rate	4 GT/s
Processor family	Intel® Core™ i7
Processor series	Intel Core i7-6500 Mobile series
Processor socket	LGA 1356 (Socket B2)
Processor threads	4
Processor codename	Skylake
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
Processor front side bus	- MHz
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	1x4, 4x1
Thermal Design Power (TDP)	15 W
Configurable TDP-up frequency	2.6 GHz
Configurable TDP-down frequency	0.8 GHz
Maximum number of PCI Express lanes	12
Numeric keypad	Yes
Pointing device	Touchpad
Recovery operating system	Windows 10 Pro
Operating system installed	Windows 7 Professional
Memory slots	2x SO-DIMM
Internal memory	8 GB
Memory clock speed	2133 MHz
Internal memory type	DDR4-SDRAM
Maximum internal memory	16 GB
Memory layout (slots x size)	1 x 4 GB
SSD capacity	The Solid State Drive's storage capacity in Gigabytes.
SSD interface	SATA
Storage media	SSD
Total storage capacity	512 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	1916
Discrete graphics card model	Not available
On-board graphics card model	Intel® HD Graphics 520
On-board graphics card family	Intel® HD Graphics
Maximum on-board graphics card memory	1.74 GB
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)	1050 MHz
Battery capacity	46 Wh
Number of battery cells	3
AC adapter power	65 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	SR2EZ
Processor ARK ID	88194
Processor package size	42 X 24 mm
Supported instruction sets	SSE4.1, SSE4.2, AVX 2.0
Intel Smart Response Technology version	1.00
Intel Stable Image Platform Program (SIPP) version	0.00
Intel segment tagging	Enterprise
HP segment	Business
HP Software provided	HP BIOSphere with HP Sure Start, HP Client Security, HP Image Assistant, HP SoftPaq Download Manager, HP Connection Manager, HP Noise Reduction Software, HP Clear Sound Amp

Weight and Dimensions

Depth	257.7 mm
Width	383.3 mm
Height	19.4 mm
Weight	1880 g