Dell D15U003 User Manual

OptiPlex 3000 Thin Client
Service Manual
Regulatory Model: D15U
Regulatory Type: D15U003
May 2022
Rev. A01

Dell D15U003 Specifications

General

Brand	Dell
Model	D15U003
Category	Desktop
Language	English

Summary

Working inside your computer

Safety instructions

General safety guidelines to protect the computer and ensure personal safety.

Before working inside your computer

Safety precautions

Electrostatic discharge—ESD protection

Methods to prevent damage to electronic components from electrostatic discharge.

Removing and installing components

Solid-state drive

Memory modules

Detailed steps for removing and installing memory modules.

WLAN card

Heat sink

System board

Procedures for removing and installing the system board.

BIOS setup

Entering BIOS setup program

System setup options

Overview of various system configuration settings available in BIOS setup.

Updating the BIOS

Procedures for updating the system's BIOS.

System and setup password

Information on setting and managing system and BIOS passwords.

Assigning a system setup password

Deleting or changing an existing system setup password

Clearing CMOS settings

Steps to reset BIOS settings by clearing CMOS.

Clearing BIOS (System Setup) and System passwords

Instructions for clearing system and BIOS passwords.

Troubleshooting

Dell SupportAssist Pre-boot System Performance Check diagnostics

Overview of hardware diagnostic tool embedded in BIOS.

Running the SupportAssist Pre-Boot System Performance Check

Step-by-step guide to run the hardware diagnostic tool.

System-diagnostic lights

Recovering the operating system

Steps to recover the operating system using Dell SupportAssist OS Recovery.

Real Time Clock-RTC reset