HP 18XL381 manual Preface

Presario 1800/1800T Series

Models: XL280, XL380, XL381,

and XL390

Preface

The Maintenance and Service Guide is a troubleshooting guide for use as a reference when servicing Compaq Presario 1800 Series Notebook Computers.

Compaq Computer Corporation reserves the right to make changes to Compaq Presario 1800 Series Notebooks without notice.

Symbols

The following words and symbols alert you to special messages throughout this guide.

ÅWARNING: Text set off in this manner indicates that a failure to follow the directions in the warning could result in bodily harm or loss of life.

ÄCAUTION: Text set off in this manner indicates that failure to follow the directions in the caution could result in damage to equipment or loss of data.

Important: Text set off in this manner presents clarifying information or specific instructions.

Note: Text set off in this manner presents comments or interesting points of information.

Technician Notes

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, the user should not attempt to make repairs at the component level or modifications to any printed circuit board. Improper repairs can create a safety hazard. Any indications of component replacement or printed circuit board modifications may void any otherwise valid warranty.

2 BEFORE YOU BEGIN PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1800 SERIES