HP NET PC 20 User Manual

Familiarization Guide

This guide is for experienced technicians who have already completed an HP PC family training course. It is a selfpaced training guide designed to train you to repair the PC. It contains information specific only to the repair of these PCs. For more information about upgrading the PC, refer to the documentation supplied with the PC or to HP’s Support Web site at http://www.hp.com/go/thinclientsupport.

HP Small PC 20 HP Net PC 20

Notice

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company.

Windows® is a U.S. registered trademark of the Microsoft Corporation.

Celeron Intel Corporation.

is a trademark, and Pentium® is a U.S. registered trademark of the

Hewlett-Packard France Thin Client Operation 38053 Grenoble Cedex 9 France

 1998 Hewlett-Packard Company

Contents

Electrostatic Discharge Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Care of Hard Disk Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

HP PC Product Comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Some Product Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

PC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

System Board and Backplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

System Board Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Removing and Replacing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . 14

Removing the Front Panel Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Installing a Hard Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Installing a Slim CD-ROM Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Installing a Slim Floppy Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Installing Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Removing and Replacing the Power Supply Unit . . . . . . . . . . . . . . 24

Removing and Replacing the System Board. . . . . . . . . . . . . . . . . . . 25

Support Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Flashing the Latest Version of the System BIOS. . . . . . . . . . . . . . . . . . . 26

Accessing the BIOS Setup Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Viewing Power On Self Test (POST) Information. . . . . . . . . . . . . . . . . . 26

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Contents

Where to Find More Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Complete the Questionnaire to Check Your Understanding . . . . . 28

Answers and Explanations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Electrostatic Discharge Warning

Electrostatic Discharge (ESD) can damage processors, memory, disks, accessory boards and other components.

When installing or replacing a component:

Do not take the new component out of its ESD package before connecting your

wrist strap and ESD mat to a suitably earthed (grounded) point.

Do not forget to use the ESD package provided with the new part to return the

old part. The ESD package is conductive and is easy to recognize from its label.

ESD Label

Care of Hard Disk Drives

Hard disk drives are delicate and are very sensitive to shocks or vibration. When installing a hard disk accessory, be careful not to drop or knock the drive. Any shock may damage the drive and prevent it from functioning correctly.

Hard disk drives already installed in HP PCs are also sensitive to shocks. If the PC’s system unit is knocked or dropped accidentally, this may cause damage to installed hard disk drives.

Avoid striking the PC

Don’t move the PC when powered on

Don’t knock the hard disk during installation

HP PC Product Comparison

The following table shows the product features of the HP Small PC 20 / HP Net PC 20 and the HP Vectra VE 8 PC.

Component HP Vectra VE 8/xxx PC HP Small PC 20 / HP Net PC 20

Microprocessor

Chipset

Memory

Intel Pentium® II for Slot 1, 266, 333, 350, or 400 MHz, 32 KB of level-1 cache memory, 512 KB of level-2 cache memory

Intel 440BX AGPset, 66 or 100 MHz bus speed.

●

AGP-enabled (Accelerated Graphics Port) for enhanced graphics performance in Intel Pentium II-based systems

●

ACPI (Advanced Configuration and Power Interface) support

●

Ultra DMA/33 hard disk support (on Primary and Secondary IDE channels)

●

SDRAM memory allows real-time data transfer from the processor, eliminating bottlenecks and improving overall system performance

32 or 64 MB installed, 384 MB maximum of nonECC SDRAM in three DIMM sockets

Intel Pentium II for Slot 1, 333 MHz, 32 KB of level-1 cache memory, 512 KB of level-2 cache memory OR Intel Celeron

, 266, 300A or 333 MHz, 32 KB of level-1 cache memory, 128 KB of level-2 cache memory in 300A and 333 MHz models, 0 KB of level-2 cache in 266 MHz models

Intel 440EX AGPset, 66 MHz bus speed.

●

AGP-enabled (Accelerated Graphics Port) for enhanced graphics performance in Intel Pentium II and Celeron-based systems

●

ACPI (Advanced Configuration and Power Interface) ready

●

Ultra DMA/33 hard disk support

●

SDRAM memory allows real-time data transfer from the processor, eliminating bottlenecks and improving overall system performance

32, 64, or 128 MB installed, 256 MB maximum of non-ECC SDRAM in two DIMM sockets

Hard Disks Flexible disk drive CD-ROM Audio Interface

LAN Interface Graphics

Operating Systems

3.2, 4.3, or 6.4 GB Ultra ATA SMART II 3.2 or 6.4 GB Ultra ATA SMART

3.5-inch, 1.44 MB capacity Slim 3.5-inch, 1.44 MB capacity (some models) 32X IDE (some models) 12.7 mm Slim 24X IDE (some models) Sound Blaster Pro compatible (Aztech) audio

board (some models)

Integrated ISA-based CrystalClear CS4235 3D Sound Blaster, Sound Blaster Pro and Windows Sound System compatible

3Com 905B-TX or Intel 10/100Base-T LAN board Integrated Intel 10/100BT with RPO/WuOL Matrox Productiva M100 AGP board, 4 MB EDO

(not upgradeable) on AGP bus

Integrated AGP-based ATI RAGE IIC/PRO AGP controller with onboard 4 MB SGRAM (not upgradeable)

Windows NT4 (Service Pack 3) or Windows 95

Windows NT 4, Windows 95 or Windows 98

(SR 2.5)

HP PC Product Comparison

Component HP Vectra VE 8/xxx PC HP Small PC 20 / HP Net PC 20

Connectors 2 serial, 1 parallel, keyboard, mouse, 2 stacked

USB, 15-pin VGA

Expandability (desktop)

5 drive shelves: 3 front-access and 2 internal Accessory Slots: 4 PCI, 1 ISA, 1 ISA/PCI combination

Expandability (minitower)

6 drive shelves: 4 front-access and 2 internal Accessory Slots: 4 PCI, 1 ISA, 1 ISA/PCI combination

BIOS

Power Supply

AMI standard BIOS AwardBIOS with 2 MB Flash EEPROM, DMI 2.0

Manually switched 115/230 VAC, 145 W continuous output

Input/Output Cables

Primary IDE cable: Ultra ATA Secondary IDE (CD-ROM) cable: Standard IDE Floppy disk drive cable

Note: both IDE channels are Ultra ATA

2 serial, 1 parallel with ECP/EPP, keyboard, mouse, 2 USB, 1 RJ45 LAN, 1 D-sub 15-pin VGA, 3 audio: 1 Mic-in, 1 Line-in, and 1 Line-out

3 drive shelves: 2 front-access and 1 internal Accessory slots: 1 PCI and 1 PCI/ISA combination. (The HP Net PC 20 does not have an ISA slot.)

(The minitower model is the same as the desktop model, but on a stand.)

compliant 100 to 240 VAC (manually switched), 85 Watt

Primary IDE cable: Ultra ATA Secondary IDE (CD-ROM) cable: Standard IDE slim cable Floppy disk drive cable

System Management

DMI 2.0 / SMBIOS 1.x, HP TopTools 3.0, HP DiagTools 2.0

DMI 2.0, ACPI-ready, TopTools Console, OpenView DTA

Some Product Features

Intel Celeron Processor The Intel Celeron processor 333, 300A and 266 MHz provides ideal performance

for applications running on operating systems such as Windows 95. All Intel Celeron processors are based on Intel’s 0.25 micron CMOS process technology. The Intel Celeron processor also benefits from the same P6 microarchitecture core as the Pentium II processor.

Intel 440EX AGPset Features

Bus Details

Video: ATI RAGE IIC/PRO AGP Chip

This Intel chipset, which is based on the Intel 440LX chipset, is optimized for Intel Celeron processor-based systems. It provides ACPI-compliance to permit increased manageability across the corporate network. It is AGP-enabled for enhanced graphics performance. The chipset also provides support for Ultra DMA/33. No Error Correcting Code (ECC) support is provided.

Bus Speed Size Transfer Rate

Host (Front Side Bus, Processor-

66 MHz 64 bit 528 MB/sec

Local, System)

AGP 66 MHz (double-

32 bit 528 MB/sec

clocked)

PCI 33 MHz 32 bit 132 MB/sec

ISA 8.25 MHz 16 bit 16 MB/sec

The system comes with an integrated AGP-based ATI RAGE IIC/PRO AGP controller chip. This VGA controller offers output pixel data rates with noninterlaced screen resolutions of up to 1600x1200x65k colors at a refresh rate of 76Hz (4 MB). The AGP controller enables the system to have a higher performance under Windows and other GUI (Graphics User Interface) environments, plus optimizations which result in even more impressive 2D and 3D performance.

The RAGE IIC/PRO delivers 3D performance unmatched in its class, along with a comprehensive list of 3D features including perspectively correct texturing, mipmapping, bilinear and trilinear filtering, z-buffering, video texturing, Gouraud shading, and alpha blending.

The RAGE IIC/PRO incorporates excellent video support, suitable for MPEG-2 content and video conferencing acceleration. In addition to offering increased performance and design flexibility, the RAGE IIC/PRO adds full PCI Power Management support.

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