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HP Presario 18XL Maintenance & Service Guide Presario 1800/1800T Series-Mo - Page 54

Troubleshooting without Diagnostics, Before Replacing Parts

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Presario 1800/1800T Series Models: XL280, XL380, XL381, and XL390 Troubleshooting without Diagnostics This section provides information about how to identify and correct some common hardware, memory, and software problems. It also explains several types of common messages that may be displayed on the screen. Ä CAUTION: Carefully match the symptoms against the problem described to avoid a misdiagnosis. Å WARNING: To avoid a potential shock hazard during troubleshooting procedures, disconnect all power sources before removing the keyboard cover or the display bezel. Select from the following to diagnose and solve problems related to each topic: Audio Battery CD or DVD Drive Diskette Drive Display Hard Drive Hardware Installation Keyboard/Numeric Keypad Memory PC Card Power Printer TouchPad Before Replacing Parts • Verify that all cables are properly connected to the parts that are to be tested. • Run Setup after connecting external devices. • Verify that all required device drivers are installed. • Verify that all required changes have been made to the CONFIG.SYS file. • Verify that all required changes have been made to the AUTOEXEC.BAT file. • Verify that all printer drivers have been installed for each application. • Check the printer connection. 18 TROUBLESHOOTING PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1800 SERIES

Section	Page
Welcome to the Maintenance & Service Guide (MSG)	1
Using this Guide	2
Viewing a Chapter	2
Expanding & Hiding Topics	2
Opening another Chapter	2
Printing the MSG	2
Before You Begin	3
Back to MSG Contents	3
Notice	3
Preface	4
Symbols	4
Technician Notes	4
Locating the Serial Number	5
Locating Additional Information	5
Product Description	6
Back to MSG Contents	6
Models and Features	7
Front of Unit	8
Internet Zone Buttons and Lights	9
Model XL280	9
Model XL3xx	10
Front Bezel Components	11
Left-Side Components	12
RightSide Components	13
Underneath the Unit	14
Rear Connectors	15
Optional QuikDock	16
Components	16
Connectors	16
Specsifications	17
Back to MSG Contents	17
Physical and Environmental	17
System Interrupts	18
System DMA	18
System I/O Addresses	19
System Memory Catalog	21
Memory Expansion	21
Display	22
Diskette Drive	22
Hard Drive	23
Battery Pack	24
CD/CD-RW/DVD Drive	24
Pin Assignments	25
Back to MSG Contents	25
Parallel Connector	25
TV-Out (Composite Video) Connector	26
Universal Serial Bus (USB) Connector	26
Keyboard/Mouse Connector	26
Modem Connector	27
External VGA Monitor Connector	27
Game Port Connector	28
Serial Connector	28
QuikDock Connector	29
Battery & Power Management	30
Back to MSG Contents	30
Power Modes	30
Hibernation	30
Standby	30
Full Off	31
Summary of Power Modes	31
Power Settings	32
Power Schemes	32
Alarms	33
SpeedStep Technology	33
Rebooting After a Lockup	34
Recovering From a Loss of Electrical Power	34
Increasing Battery Pack Operating Time	35
Minimizing the Energy Required	35
Maximizing the Energy Stored	35
Conditioning a Battery Pack	36
Disposing of a Used Battery Pack	36
Troubleshooting	37
Back to MSG Contents	37
Preliminary Steps	38
Clearing the Power-On Password	39
Power-On Self-Test (POST)	40
POST Error Messages	40
Compaq Diagnostics	42
Checkup (TEST)	43
View System Information (INSPECT)	44
Diagnostic Error Codes	45
Troubleshooting without Diagnostics	54
Before Replacing Parts	54
Solving Minor Problems	55
Audio Solutions	55
Battery Pack/Gauge Solutions	55
CD and DVD Drive Solutions	58
Diskette Drive Solutions	58
Display Solutions	59
Hard Drive Solutions	62
Hardware Installation Solutions	62
Keyboard/Numeric Keypad Solutions	63
Memory Solutions	63
PC Card Solutions	64
Power Solutions	66
Printer Solutions	67
TouchPad/Pointing Device Solutions	68
Contacting Compaq Support	69
Shipping Preparation	69
Removal & Replacement	70
Back to MSG Contents	70
Electrostatic Discharge	70
Required Tools	71
Screws	71
Connectors & Plastic Parts	71
ZIFConnector	72
Cables	73
Hard Drive Ribbon Cable	74
CD/DVDRibbonCable	75
DisketteDriveRibbonCable	76
SpeakerAssemblyCable	77
Keyboard Ribbon Cable	78
Preparing the Notebook for Disassembly	79
Removal Procedures	80
QuikDock	80
Battery Pack	81
Palmrest Cover with TouchPad	82
Keyboard	85
Button Board Cover	86
Internet Switch Board	90
Heat Sink (Heatspreader)	92
Modem	93
Hard Drive	94
LCD DisqPlay Module	97
Processor	98
CD, CD-RW, or DVD Drive	100
Display Panel Assembly	103
Upper CPU Cover	106
Fan Assembly	107
Real Time Clock (RTC) Battery	109
Diskette Drive	111
Voltage Converter Board	113
Speaker Assembly	114
System Board	116
Memory Module	121
Parts Catalog	123
Back to MSG Contents	123
Illustrated Parts	123
System Unit	123
Boards	124
Display Assembly	125
Mass-Storage Devices	126
Miscellaneous Cable Kit	127
Miscellaneous Hardware Kit	127
Miscellaneous Plastics Kit	128
Miscellaneous Parts	129
Documentation & Software	129
PartNumbers&Availability	130
Build-to-Order Models	130
Alphabetical Spares Listing	131