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.
TM
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
3
Contents
Where to Find More Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Complete the Questionnaire to Check Your Understanding . . . . . 28
Answers and Explanations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4
Electrostatic Discharge Warning
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
1
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
2
old part. The ESD package is conductive and is easy to recognize from its label.
ESD Label
5
Care of Hard Disk Drives
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
6
HP PC Product Comparison
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
TM
, 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)
7
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
8
Some Product Features
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.
9
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