HP ZBook 17 G4 Mobile Workstation User Manual

Table 7-5 System diagnostics failure codes and user actions (continued)
Test description Failure description
Error
code Suggested user actions
Chassis Fan Not
Detected (Front)
Fan Fan not operating correctly 90B The system fan may be malfunctioning. Replace the fan.
System Temperature Thermal shutdown has
occurred.
90D The System BIOS has detected your machine was previously shut
down to avoid overheating. Overheating may occur if the cooling
vents are blocked or the operating temperature exceeds the
system specications. The machine should return to normal
operation once the situation is resolved.
Fan Speed Failure The system has detected
that a cooling fan may not
be working properly.
90F Try the following:
●
Press Enter to clear the message and boot to the Windows
desktop.
●
Shut down Windows.
●
Clean the exterior of the vents to remove dust build-up
while the computer is O.
●
Check for a BIOS update.
Power Good (Troubleshooting) lights
HP has added troubleshooting power lights to mobile workstations to help troubleshoot power-on issues. The
lights indicate when the system board power rails are unstable and/or the system needs a hardware reset.
Power good lights
These lights should be visible after removing the service door or bottom
cover. Consult with support for platform-specic locations of the lights.
Troubleshooting lights diagram
●
Example: System board is good. Lights that turn on briey (< 1 second) and immediately turn o indicate
normal function. In this case, system (3.3V), power good (3.3V), and system reset (3.3V) are all good and
troubleshooting lights should not be lit. However, other external lights should be lit as normal
afterward.
General troubleshooting steps 89

HP ZBook 17 G4 Mobile Workstation Specifications

General

Brand	HP
Model	ZBook 17 G4 Mobile Workstation
Category	Laptop
Language	English

Summary

Product Description

External Component Identification

Locating Hardware and Software

How to find installed hardware and software on the computer.

External Component Locations

Identifies components on the right, left, top, bottom, and front of the computer.

Indicators, Buttons, and Keys

Explains indicator lights, power buttons, special function keys, and hot keys.

System Information Location

Explains how to locate essential system information on the computer.

Illustrated Parts Catalog

Computer Major Components

Lists and illustrates the main components of the computer.

Display Assembly Subcomponents

Details the subcomponents of the display assembly.

Miscellaneous Parts

Lists various miscellaneous parts and accessories.

Removal and Replacement Procedures Preliminary Requirements

Tools and General Precautions

Lists required tools and general considerations for disassembly.

Component Handling Guidelines

Guidelines for handling cables, connectors, and fragile drive components.

ESD and Workstation Safety

Covers grounding, packaging, workstation, and equipment safety guidelines.

Removal and Replacement Procedures for Customer Self-Repair Parts

Component Replacement Procedures Overview

Introduces the procedures for replacing customer self-repair parts.

Service Door

Step-by-step instructions to remove and replace the service door.

Battery

Step-by-step instructions to remove and replace the battery.

Base Enclosure

Step-by-step instructions to remove and replace the base enclosure.

Hard Drive and Internal Frame

Procedures for removing and replacing hard drives and internal frames.

Solid-State Drives (M.2)

Procedures for removing and replacing M.2 solid-state drives.

WLAN Module

Procedures for removing and replacing the WLAN module.

WWAN Module

Procedures for removing and replacing the WWAN module.

Memory Module

Procedures for removing and replacing memory modules.

Removal and Replacement Procedures for Authorized Service Provider Parts

Component Replacement Procedures

Introduces procedures for parts accessed by authorized service providers.

RTC Battery

Procedures for removing and replacing the RTC battery.

Speakers

Procedures for removing and replacing the speakers.

TouchPad

Procedures for removing and replacing the TouchPad.

Smart Card Reader and Frame

Procedures for removing and replacing the smart card reader.

Fingerprint Reader Board

Procedures for removing and replacing the fingerprint reader board.

Fan

Procedures for removing and replacing internal fans.

Heat Sink

Procedures for removing and replacing the heat sink.

Discrete Graphics Board

Procedures for removing and replacing the discrete graphics board.

Display LED Board

Procedures for removing and replacing the display LED board.

Keyboard

Procedures for removing and replacing the keyboard.

System Board

Procedures for removing and replacing the system board.

Display Assembly

Procedures for removing and replacing the display assembly.

Troubleshooting Guide

General Troubleshooting Steps

Outlines general steps and methodology for troubleshooting.

Identify the Issue

Step one: understanding the issue and the boot-up sequence.

Failure Classification

Classifies failures based on boot-up sequence and hardware.

Analyze the Issue

Steps to analyze the cause of an issue.

Common Issues and Possible Solutions

Addresses common issues with symptoms and potential solutions.

Using HP PC Hardware Diagnostics (UEFI)

Downloading HP PC Hardware Diagnostics (UEFI) to a USB Device

Instructions for downloading the HP PC Hardware Diagnostics tool.

Additional BIOS Crisis Recovery Tool

Information about the BIOS crisis recovery tool.

Specifications

Computer Specifications

Provides detailed technical specifications of the computer.

Power Cord Set Requirements

Requirements for All Countries

Outlines general power cord set requirements applicable globally.

Requirements for Specific Countries and Regions

Lists power cord set requirements for specific countries and regions.

Statement of Memory Volatility

Nonvolatile Memory Usage

Explains the usage and characteristics of nonvolatile memory.

Questions and Answers

Provides answers to frequently asked questions about BIOS and memory.

Recycling