compaq presario 2800 User Manual

							1–16Maintenance and Service Guide
Product Description
1.5 Design Overview
This section presents a design overview of key parts and features 
of the computer. Refer to Chapter 3, “Illustrated Parts Catalog,” 
to identify replacement parts, and Chapter 5, “Removal and 
Replacement Procedures,” for disassembly steps. The system 
board provides the following device connections:
■Memory expansion board
■Hard drive
■Display
■Keyboard/TouchPad or pointing stick
■Audio
■Intel Mobile Pentium 4 processors with SpeedStep 
technology
■Fan
■PC Card
■Modem or modem/NIC
The computer uses an electrical fan for ventilation. The fan is 
controlled by a temperature sensor and is designed to turn on 
automatically when high temperature conditions exist. These 
conditions are affected by high external temperatures, system 
power consumption, power management/battery conservation 
configurations, battery fast charging, and software applications. 
Exhaust air is displaced through the ventilation grill located on 
the left side of the computer.
ÄCAUTION: To properly ventilate the computer, allow at least a 
3-inch (7.6 cm) clearance on the left and right sides of the 
computer.
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							Maintenance and Service Guide2–1
2
Troubleshooting
ÅWARNING: Only authorized technicians trained by Compaq should 
repair this equipment. All troubleshooting and repair procedures 
are detailed to allow only subassembly/module level repair. 
Because of the complexity of the individual boards and 
subassemblies, no one should attempt to make repairs at the 
component level or to make modifications to any printed wiring 
board. Improper repairs can create a safety hazard. Any indication 
of component replacement or printed wiring board modification may 
void any warranty or exchange allowances.
2.1 Computer Setup and Diagnostics 
Utilities
Selecting Computer Setup or Compaq 
Diagnostics
The computer features two Compaq system management utilities:
■Computer Setup—A system information and customization 
utility that can be used even when your operating system is 
not working or will not load. This utility includes settings that 
are not available in Windows.
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							2–2Maintenance and Service Guide
Troubleshooting
■Compaq Diagnostics—A system information and diagnostic 
utility that is used within your Windows operating system. 
Use this utility whenever possible to:
❏Display system information.
❏Test system components.
❏Troubleshoot a device configuration problem in 
Windows 2000, Windows XP Professional, or 
Windows XP Home.
✎It is not necessary to configure a device connected to a USB 
connector on the computer or an optional docking base.
Using Computer Setup
Information and settings in Computer Setup are accessed from 
the File, Security, or Advanced menus:
1. Turn on or restart the computer. Press 
F10 while the 
F10 = ROM Based Setup message is displayed in the 
lower-left corner of the screen.
❏To change the language, press F2.
❏
To view navigation information, press F1.
❏
To return to the Computer Setup menu, press esc.
2. Select the File, Security, or Advanced menu.
3. To close Computer Setup and restart the computer:
❏Select File > Save Changes and Exit and press enter.
or
❏Select File > Ignore Changes and Exit and press enter.
4. When you are prompted to confirm your action, press F10.
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							Troubleshooting
Maintenance and Service Guide2–3
Selecting from the File Menu
Table 2-1
File Menu
Select To Do This
System Information■View identification information about the 
computer, a docking base, and any battery 
packs in the system.
■View specification information about the 
processor, memory and cache size, and 
system ROM.
Save to Floppy Save system configuration settings to a diskette.
Restore from Floppy Restore system configuration settings from a 
diskette.
Restore Defaults Replace configuration settings in Computer 
Setup with factory default settings. (Identification 
information is retained.)
Ignore Changes and Exit Cancel changes entered during the current 
session, then exit and restart the computer.
Save Changes and Exit Save changes entered during the current 
session, then exit and restart the computer.
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							2–4Maintenance and Service Guide
Troubleshooting
Selecting from the Security Menu
Table 2-2
Security Menu
Select To Do This
Setup Password Enter, change, or delete a setup password. 
(The setup password is called an administrator 
password in Compaq Computer Security, a 
program accessed from the Windows Control 
Panel.)
Power-on Password Enter, change, or delete a power-on password.
DriveLock Passwords Enable/disable DriveLock; change a DriveLock 
User or Master password.
✎DriveLock Settings are accessible only 
when you enter Computer Setup by 
turning on (not restarting) the computer.
Password Options
Password options can be 
selected only when a 
power-on password has 
been set.Enable/Disable:
■QuickLock
■QuickLock on Suspend
■QuickBlank
✎To enable QuickLock on Suspend or 
QuickBlank, you must first enable 
QuickLock.
Device Security Enable/Disable:
■Ports or diskette drives*
■Diskette write*
■CD-ROM or diskette startup
✎Settings for a DVD-ROM can be 
entered in the CD-ROM field.
System IDs Enter identification numbers for the computer, 
a docking base, and all battery packs in the 
system.
*Not applicable to SuperDisk LS-120 drives.
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							Troubleshooting
Maintenance and Service Guide2–5
Selecting from the Advanced Menu
Table 2-3
Advanced Menu
Select To Do This
Language (or press F2) Change the Computer Setup language.
Boot Options Enable/Disable:
■QuickBoot, which starts the computer more 
quickly by eliminating some startup tests. 
(If you suspect a memory failure and want 
to test memory automatically during startup, 
disable QuickBoot.)
■MultiBoot, which sets a startup sequence 
that can include most bootable devices and 
media in the system.
Device Options
■Enable/disable the embedded numeric 
keypad at startup.
■Enable/disable multiple standard pointing 
devices at startup. (To set the computer to 
support only a single, usually nonstandard, 
pointing device at startup, select Disable.)
■Enable/disable USB legacy support for a 
USB keyboard. (When USB legacy support 
is enabled, the keyboard works even when a 
Windows operating system is not loaded.)
■Set an optional external monitor or overhead 
projector connected to a video card in a 
docking base as the primary device. (When 
the computer display is set as secondary, 
the computer must be shut down before 
undocking from a docking base.)
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							2–6Maintenance and Service Guide
Troubleshooting
Device Options 
(continued)■Change the parallel port mode from EPP 
(Enhanced Parallel Port [default]) to 
standard, bidirectional, EPP or ECP 
(Enhanced Capabilities Port).
■Set video-out mode to NTSC (default), PAL, 
NTSC-J, or PAL-M.*
■Enable/disable all settings in the SpeedStep 
window. (When Disable is selected, the 
computer runs in Battery Optimized mode.)
■Specify how the computer recognizes 
multiple identical docking bases that are 
identically equipped. (Select Disable to 
recognize the docking bases as a single 
docking base; select Enable to recognize 
the docking bases individually, by serial 
number.)
■Enable/disable the reporting of the 
processor serial number by the processor to 
the software.
HDD Self Test Options Run a quick comprehensive self test on hard 
drives in the system that support the test 
features.
*Video modes vary even within regions. However, NTSC is common in North 
America; PAL, in Europe, Africa, and the Middle East; NTSC-J, in Japan; and 
PAL-M, in Brazil. Other South and Central American regions may use NTSC, 
PAL, or PAL-M.
Table 2-3
Advanced Menu (Continued)
Select To Do This
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							Troubleshooting
Maintenance and Service Guide2–7
2.2 Using Compaq Diagnostics
When you access Compaq Diagnostics, a scan of all system 
components is displayed on the screen before the Compaq 
Diagnostics window opens.
You can display more or less information from anywhere within 
Compaq Diagnostics by selecting Level on the menu bar.
Compaq Diagnostics is designed to test Compaq components. 
If non-Compaq components are tested, the results may be 
inconclusive.
Obtaining, Saving, or Printing
Configuration Information
1. Access Compaq Diagnostics by selecting Start > Settings > 
Control Panel > Compaq Diagnostics.
2. Select Categories, then select a category from the drop-down 
list.
❏To save the information, select File > Save As.
❏To print the information, select File > Print.
3. To close Compaq Diagnostics, select File > Exit.
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							2–8Maintenance and Service Guide
Troubleshooting
Obtaining, Saving, or Printing Diagnostic
Test Information
1. Access Compaq Diagnostics by selecting Start > Settings > 
Control Panel > Compaq Diagnostics.
2. Select the Te s t tab.
3. In the scroll box, select the category or device you want 
to test.
4. Select a test type:
❏Quick Test—Runs a quick, general test on each device in 
a selected category.
❏Complete Test—Performs maximum testing on each 
device in a selected category.
❏Custom Test—Performs maximum testing on a selected 
device.
◆To run all tests for your selected device, select the 
Check All button.
◆To run only the tests you select, select the Uncheck 
All button, then select the checkbox for each test you 
want to run.
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							Troubleshooting
Maintenance and Service Guide2–9
5. Select a test mode:
❏Interactive Mode—Provides maximum control over the 
testing process. You determine whether the test was 
passed or failed and may be prompted to insert or remove 
devices.
❏Unattended Mode—Does not display prompts. If errors 
are found, they are displayed when testing is complete.
6. Select the Begin Testing button.
7. Select a tab to view a test report:
❏Status tab—Summarizes the tests run, passed, and failed 
during the current testing session.
❏Log tab—Lists tests run on the system, the number of 
times each test has run, the number of errors found on 
each test, and the total run time of each test.
❏Error tab—Lists all errors found in the computer with 
their error codes.
8. Select a tab to save the report:
❏Log tab—Select the Log tab Save button.
❏Error tab—Select the Error tab Save button.
9. Select a tab to print the report:
❏Log tab—Select File > Save As, then print the file from 
your folder.
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