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TROUBLESHOOTING
Clearing CMOS
Troubleshooting Without Diagnostics
Power-On Self
Test (POST)
This section describes some simple, preliminary tests and guidelines for troubleshooting the
Setup and
computer.
Compaq Utilities
Checklist For Solving Minor Problems
Diagnostic error
codes
If you encounter some minor problem with the computer or software application, go through this
checklist for possible solutions before running any of the diagnostic utilities:
Troubleshooting
without
diagnostics
l
Click on a link below for quick checks and possible solutions for problems related to these topics:
Resolving Hardware Conflicts
Hardware conflicts may occur when two or more peripheral devices attempt to use the same hardware
resources. Interrupts, I/O addresses, and DMA channels are the most common hardware resources
used by peripheral devices. For example, the factory default settings for the MIDI port audio interface
are:
When different peripheral devices use the same hardware resources at the same time, the devices
and/or the system may not function properly. Although PCI devices are required to be capable of
sharing IRQs with other PCI devices, conflict may still arise at the software level. In this case, contact
the vendor for updated drivers.
You can resolve hardware conflicts by ensuring that no devices are configured to use the same
hardware resources. These resources can either be dipswitch or jumper settings on the peripheral
card or software configurable resources. The
you to view and modify the settings for the peripheral devices which were factory installed in your
system. Refer to the User's Guide for the particular peripheral cards you wish to install for information
on how to view and select their settings.
To resolve hardware conflicts:
Also see...
Maintenance and Service Guide
Compaq 2200 and 2400 Series Computers
Troubleshooting
Is the computer connected to a working power outlet?
Is the computer turned on and the power light illuminated?
Are all cables connected properly and seated?
Are all of the necessary device drivers installed?
Is the CONFIG.SYS file correct?
Is the AUTOEXEC.BAT file (MS-DOS) or STARTUP.CMD file correct?
Was a nonbootable diskette loaded in the diskette drive at power-up?
Are all switch settings correct?
Was Computer Setup run after installing options (memory, disk drives, etc.)
and before installing industry standard architecture boards?
CD drive
diskette drive
DVD drive
Problem
Probable
cause(s)
Cannot read
CD is not properly
compact disc
seated in the drive.
CD has been loaded
upside down.
CD may be dirty or
scratched.
Cannot eject
CD is not properly
compact disc
seated in the drive.
(tray-load
only)
CD drive
Power cycle delay.
devices are
not detected
CD drive is not
connected properly.
Proper driver is not
loaded
Problem
Probable
cause(s)
Cannot
DVD or CD is not
read DVD
properly seated in the
disk
drive.
DVD or CD has been
loaded upside down.
DVD or CD disk may be
dirty or scratched.
DVD does
Proper drivers are not
not work in
loaded.
the DOS
mode
Cannot
The system is in the
eject DVD
Sleep mode.
disk
The DVD, diskette, or
hard drive was active
when attempting to
eject the DVD.
DVD disk is not
properly seated in the
drive.
DVD drive
DVD drive is not
devices are
connected properly.
not
detected
Incorrect driver is
installed.
Drive has been
changed.
Proper drivers are not
loaded.
Base I/O address
MIDI Port Base I/O address
Interrupt
8-bit DMA
1
Change the hardware settings of your audio card or other peripheral card in your
system if the peripheral card is using any settings used by the factory-installed
devices.
2
If you are unsure of the settings of the peripheral cards, you can isolate the source
of the problem by temporarily removing all cards not maufactured by Compaq, or
resetting the default settings and running
cards back one at a time until the card that is causing the conflict is found.
System specifications
Removal & Replacement
Jumper & Switch Information
hard drive
hardware conflicts
hardware installation
CD drive
Possible solution
Eject the CD, press down on the CD firmly to
correctly seat it in the drive, then reload.
Eject the CD, turn it over, then reload.
Clean the CD or load another CD.
Turn off the computer, insert a straightened
paper clip into the emergency eject hole,
then push firmly. Slowly pull the tray out
from the drive until the tray is fully extended,
then remove the CD.
After turning the computer off, wait 30
seconds before turning the computer on
again.
Open the computer and check to see that the
drive cable is connected properly.
Restart the system and make sure the CD
drive drivers are loaded.
DVD drive
Possible solution
Eject the DVD or CD, press down on the DVD
or CD firmly to correctly seat it in the drive,
then reload.
Eject the disk, turn it over, then reload.
Load another DVD disk.
Restart the system and make sure the DVD
drive drivers are loaded.
Press the Power button to bring the system
back to full power, then eject the DVD.
Wait until all drive activity ends (the CD/hard
drive light and diskette drive light will go out),
then try to eject the DVD.
Turn off the computer, insert a straightened
paper clip into the emergency eject hole, then
push firmly. Slowly pull the tray out from the
drive until the tray is fully extended, then
remove the DVD disk.
Open the computer and check to see that the
drive cable is connected properly.
Ensure the correct driver is installed in
CONFIG.SYS.
Make sure the jumper setting is set for
"Slave."
Restart the system and make sure the DVD
drive drivers are loaded.
220H
330H
IRQ 5
Channel 1
Computer Setup
Compaq
Illustrated Parts Catalog
Specifications
power
USB ports
monitor
selection of your Compaq Utilities allows
Utilities. After that, add the
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