Compaq 7470 Service Guide - Page 17

Flat-panel monitor, CD drive, Problem, Probable, causes, Possible solution, DVD drive, Probable - presario drivers

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MSG index Home Maintenance and Service Guide Compaq Presario 7400 Series Computers Product Description Removal & Replacement Troubleshooting Jumper & Switch Information Illustrated Parts Catalog Specifications Troubleshooting Clearing CMOS Power-On Self Test (POST) Configuration Diagnostics Software Troubleshooting without diagnostics TROUBLESHOOTING Troubleshooting Without Diagnostics This section describes some simple, preliminary tests and guidelines for troubleshooting the computer. Checklist For Solving Minor Problems If you encounter some minor problem with the computer or with a software application, go through the following checklist for possible solutions before running any of the diagnostic utilities: q Is the computer connected to a working power outlet? q Is the computer turned on and the power light illuminated? q Are all cables connected properly and seated? q Are all of the necessary device drivers installed? q Is the CONFIG.SYS file correct? q Is the AUTOEXEC.BAT file (MS-DOS) or STARTUP.CMD file correct? q Was a nonbootable diskette loaded in the diskette drive at power-up? q Are all switch settings correct? q Was Computer Setup run after installing the options (memory, disk drives, etc.) and before installing the industry standard architecture boards? Quick checks and possible solutions for problems related to these topics: CD drive diskette drive DVD drive flat-panel monitor (on select models only) hard drive hardware installation power USB ports VGA monitor are provided in the tables below. The procedure for resolving hardware conflicts is also described. Flat-panel monitor Problem Probable cause(s) Possible solution Screen is blank. Your computer may not support flat-panel monitors. See your authorized dealer or reseller about CPU support for the Digital Video Interface (DVI) needed. Cannot find the video connector on back of the CPU for a flatpanel monitor. Your computer may not have a digital flatpanel port (DFPP). See your authorized dealer or reseller about CPU support for flat-panel monitors. The display only fills part of the screen. The monitor does not support your resolution setting. FP400 and FP500 Series flat-panel monitors only support the 1024 x 768 resolution mode. To change your resolution setting in the Display dialog box: 1 Click on Start. 2 Point at Settings and click on Control Panel. 3 Double-click on Display. 4 Click on the Setting tab, and move the sliding pointer to give 1024 x 768 pixel resolution. Green power light is flashing. Your flat-panel monitor does not support the video resolution or refresh rate. FP400 and FP500 Series flat-panel monitors only support 1024 x 768 resolution mode. Connect a VGA monitor temporarily and change your resolution setting in the Display dialog box: 1 Click on Start 2 Point at Settings and click on Control Panel 3 Double-click on Display 4 Click on the Setting tab, and move the sliding pointer to give 1024 x 768 pixel resolution. CD drive Problem Probable cause(s) Possible solution Cannot read compact disc. CD is not properly seated in the drive. Eject the CD, then re-insert it, pressing down gently on the CD to correctly seat it in the drive. CD has been loaded upside down. Eject the CD, turn it over, then reload. CD may be dirty or scratched. Clean the CD or load another CD. Cannot eject compact disc (tray-load only). CD is not properly seated in the drive. 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. CD drive devices are not detected. Power cycle delay CD drive is not connected properly. 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. Proper driver is not loaded. Restart the system and make sure the CD drive drivers are loaded. DVD drive Problem Probable cause(s) Possible solution Cannot read DVD disc DVD or CD is not properly seated in the drive. Eject the DVD or CD, press down on the DVD or CD firmly to seat it correctly in the drive, then reload. DVD or CD has been loaded upside down. Eject the disc, turn it over, then reload. DVD or CD disc may be dirty or scratched. Load another DVD disk. DVD does not work in the DOS mode. Proper drivers are not loaded. Restart the system and make sure the DVD drive drivers are loaded. Cannot eject DVD disc. The system is in the Sleep mode. Press the Power button to bring the system back to full power, then eject the DVD. The DVD, diskette, or hard drive was active when attempting to 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. DVD disc is not properly seated in the drive. 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. DVD drive devices are not detected. DVD drive is not connected properly. Incorrect driver is installed. Open the computer and check to see that the drive cable is connected properly. Ensure the correct driver is installed in CONFIG.SYS. Drive has been changed. Make sure the jumper setting is set for "Slave." Proper drivers are not loaded. Restart the system and make sure the DVD drive drivers are loaded. Resolving Hardware Conflicts Hardware conflicts occur when two or more peripheral devices attempt to use the same hardware resources. I/O addresses, interrupts, 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: Base I/O address MIDI Port Base I/O address Interrupt 8-bit DMA 220H 330H IRQ 5 Channel 1 When different peripheral devices use the same hardware resources at the same time, the devices and/or the system may not function properly. 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 Computer Setup selection of your Compaq Utilities allows you to view and modify the settings for the peripheral devices 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: 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 manufactured by Compaq, or resetting the default settings and running Compaq Utilities. After that, add the cards back one at a time until the card that is causing the conflict is found. Also see: System

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Maintenance and Service Guide
Compaq Presario 7400 Series Computers
MSG index
Product Description
Troubleshooting
Illustrated Parts Catalog
Home
Removal & Replacement
Jumper & Switch Information
Specifications
Troubleshooting
Clearing CMOS
Power-On Self Test
(POST)
Configuration
Diagnostics Software
Troubleshooting
without diagnostics
TROUBLESHOOTING
Troubleshooting Without Diagnostics
This section describes some simple, preliminary tests and guidelines for troubleshooting the
computer.
Checklist For Solving Minor Problems
If you encounter some minor problem with the computer or with a software application,
go through the following checklist for possible solutions before running any of the diagnostic
utilities:
●
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 the options (memory, disk drives, etc.)
and before installing the industry standard architecture boards?
Quick checks and possible solutions for problems related to these topics:
CD drive
hard drive
VGA monitor
diskette drive
hardware installation
DVD drive
power
flat-panel monitor
(on
select models only)
USB ports
are provided in the tables below. The procedure for
resolving hardware conflicts
is also described.
Flat-panel monitor
Problem
Probable cause(s)
Possible solution
Screen is
blank.
Your computer may
not support flat-panel
monitors.
See your authorized dealer or reseller about CPU
support for the Digital Video Interface (DVI) needed.
Cannot find
the video
connector on
back of the
CPU for a flat-
panel monitor.
Your computer may
not have a digital flat-
panel port (DFPP).
See your authorized dealer or reseller about CPU
support for flat-panel monitors.
The display
only fills part
of the screen.
The monitor does not
support your
resolution setting.
FP400 and FP500 Series flat-panel monitors only
support the 1024 x 768 resolution mode. To change
your resolution setting in the
Display
dialog box:
1
Click on
Start
.
2
Point at
Settings
and click on
Control Panel
.
3
Double-click on
Display
.
4
Click on the
Setting
tab, and move the sliding
pointer to give 1024 x 768 pixel resolution.
Green power
light is
flashing.
Your flat-panel
monitor does not
support the video
resolution or refresh
rate.
FP400 and FP500 Series flat-panel monitors only
support 1024 x 768 resolution mode. Connect a VGA
monitor temporarily and change your resolution
setting in the
Display
dialog box:
1
Click on
Start
2
Point at
Settings
and click on
Control Panel
3
Double-click on
Display
4
Click on the
Setting
tab, and move the
sliding pointer to give 1024 x 768 pixel
resolution.
CD drive
Problem
Probable
cause(s)
Possible solution
Cannot read
compact disc.
CD is not properly
seated in the drive.
Eject the CD, then re-insert it, pressing down
gently on the CD to correctly seat it in the
drive.
CD has been loaded
upside down.
Eject the CD, turn it over, then reload.
CD may be dirty or
scratched.
Clean the CD or load another CD.
Cannot eject
compact disc
(tray-load
only).
CD is not properly
seated in the drive.
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.
CD drive devices
are not
detected.
Power cycle delay
After turning the computer off, wait 30
seconds before turning the computer on again.
CD drive is not
connected properly.
Open the computer and check to see that the
drive cable is connected properly.
Proper driver is not
loaded.
Restart the system and make sure the CD
drive drivers are loaded.
DVD drive
Problem
Probable cause(s)
Possible solution
Cannot
read DVD
disc
DVD or CD is not properly
seated in the drive.
Eject the DVD or CD, press down on the DVD or
CD firmly to seat it correctly in the drive, then
reload.
DVD or CD has been
loaded upside down.
Eject the disc, turn it over, then reload.
DVD or CD disc may be
dirty or scratched.
Load another DVD disk.
DVD does
not work in
the DOS
mode.
Proper drivers are not
loaded.
Restart the system and make sure the DVD
drive drivers are loaded.
Cannot
eject DVD
disc.
The system is in the
Sleep mode.
Press the Power button to bring the system back
to full power, then eject the DVD.
The DVD, diskette, or
hard drive was active
when attempting to 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.
DVD disc is not properly
seated in the drive.
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.
DVD drive
devices are
not
detected.
DVD drive is not
connected properly.
Open the computer and check to see that the
drive cable is connected properly.
Incorrect driver is
installed.
Ensure the correct driver is installed in
CONFIG.SYS.
Drive has been changed.
Make sure the jumper setting is set for "Slave."
Proper drivers are not
loaded.
Restart the system and make sure the DVD
drive drivers are loaded.
Resolving Hardware Conflicts
Hardware conflicts occur when two or more peripheral devices attempt to use the same hardware
resources. I/O addresses, interrupts, 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:
Base I/O address
220H
MIDI Port Base I/O address
330H
Interrupt
IRQ 5
8-bit DMA
Channel 1
When different peripheral devices use the same hardware resources at the same time, the devices
and/or the system may not function properly. 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
Computer Setup selection of your Compaq Utilities allows you to view and modify the settings for
the peripheral devices 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:
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 manufactured by
Compaq, or resetting the default settings and running Compaq Utilities. After
that, add the cards back one at a time until the card that is causing the conflict is
found.
Also see:
System