Compaq 1800 Anleitung zur Fehlerbehebung Seite 59
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24 T
ROUBLESHOOTING
P
RESARIO
N
OTEBOOK
M
AINTENANCE
AND
S
ERVICE
G
UIDE
1800 S
ERIES
Presario 1800 Series
Models: XL180, XL181, XL182, XL183, XL184, XL185,
and XL190, XL191, XL192
**This problem indicates that the backlight or its power circuitry has failed. If the backlight is
not functioning, the POST result cannot be observed. Connect the unit to an external
monitor before powering up the unit. If an external monitor is not available verify that POST
is complete by opening and closing the display, listening for the single or double beep, and
watching for the icons to turn on at the front of the notebook.
Screen is blank. Display has overheated. If the Notebook is in direct
sunlight, move it and allow it to
cool off.
Display is blank and
the Standby icon is
flashing.
System is in Standby mode. Press any key or touch the
TouchPad.
Notebook display is
blank and the screen
on an external monitor
displays information.
Display function was switched
to the external monitor.
Use Fn+F3 to switch between
LCD or CRT.
Notebook display
flashes or has garbled
characters when
Notebook is connected
to external monitor.
The external monitor is set for
1024x768 or higher resolution
and view is toggled back to
the Notebook display, which
supports up to 800x600.
Restart the Notebook.
The light tubes on the
edge of the display
panel do no light up at
all and the Power-On
Self-Test (POST)
completes when the
unit is powered up.**
Improper backlight or display
cable connections
1. Check the display cable
connections and retest.
2. Replace the display assembly
.
Defective inverter board. Replace the display assembly
.
Defective display cable. Replace the display assembly.
Defective display panel. Replace the display assembly
.
Defective system board. Replace the system board.
The light tubes on the
edge of the display
panel do not light up
at all and Power-On
Self-Test (POST) does
not complete when the
unit is powered up.**
Defective system board. Replace the system board
.
Display
Problem Probable Cause Solution(s)
- Before You Begin 1
- Product Description 5
- Models and Features 6
- Front of Unit 7
- Front Bezel Components 9
- Right-Side Components 10
- Left-Side Components 11
- Underneath the Unit 12
- Rear Connectors 13
- QuikDock Components 14
- QuikDock Connectors 14
- Specifications 15
- System Interrupts 16
- System DMA 16
- System I/O Address 17
- System Memory Catalog 18
- Display Information 19
- Memory Expansion 20
- Diskette Drive 20
- Hard Drive 21
- CD or DVD Drive 21
- Battery Pack 22
- Connector Pin Assignments 23
- Serial Connector 24
- Keyboard/Mouse Connector 24
- Modem Connector 25
- Game Port Connector 25
- External VGA Monitor Port 26
- S-Video Connector 26
- TV Out Connector 27
- Univeral Serial Bus (USB) 27
- QuikDock Connector 28
- Battery and Power Management 29
- Full Off 30
- Summary of Power Modes 30
- Power Settings 31
- SpeedStep Technology 32
- Rebooting After a Lockup 33
- Maximizing the Energy Stored 34
- Conditioning a Battery Pack 35
- Troubleshooting 36
- Preliminary Steps 37
- Power-On Self Test (POST) 39
- Compaq Diagnostics 41
- Checkup (TEST) 42
- Diagnostic Error Codes 44
- Before Replacing Parts 53
- Solving Minor Problems 54
- Contacting Compaq Support 68
- Removal and Replacement 69
- Connectors and Plastic Parts 70
- Disconnecting the QuikDock 80
- Removing the Battery 81
- Removing the Keyboard 85
- Removing the Heatspreader 91
- Removing the Modem 92
- Removing the Hard Drive 93
- Removing the DisqPlay Module 95
- Removing the Processor 96
- Removing the CD/DVD Drive 98
- Presario 1800 Series 100
- Removing the Upper CPU Cover 102
- Removing the Fan Assembly 103
- Removing the Diskette Drive 107
- Removing the Speaker Assembly 110
- Removing the System Board 112
- Removing the Memory Module 115
- Illustrated Parts Catalog 116
- System Units 117
- System Boards 118
- Display Panel Assembly 119
- Mass Storage Devices 119
- Miscellaneous Cables 120
- Miscellaneous Hardware Kit 121
- Miscellaneous Plastics 122
- Miscellaneous Parts 123
- Documentation and Software 123
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