HP ProBook 4520s Notebook PC HP ProBook 4720s Notebook PC

Maintenance and Service Guide

Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. Intel, Core, and Celeron are trademarks of Intel Corporation in the United States and other countries. Microsoft, Windows, and Windows Vista are U.S. registered trademarks of Microsoft Corporation. SD Logo is a trademark of its proprietor.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

First Edition: March 2010

Document Part Number: 598082-001

Safety warning notice

• WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The computer and the AC adapter comply with the user-accessible surface temperature limits defined by the International Standard for Safety of Information Technology Equipment (IEC 60950).

Table of contents

Table Caption: This table of contents outlines the key sections of a product manual, covering product description, external component identification, an illustrated parts catalog, and removal and replacement procedures. It details specific components, part listings, and essential requirements for servicing.

Table Caption: This table lists various components and procedures related to computer hardware, organized by topic and page number, with some entries duplicated across columns.

Table Caption: This table of contents outlines specifications for computer components, backup and recovery procedures for different Windows operating systems, connector pin assignments, and power cord set requirements. It covers topics from hardware details to system maintenance and connectivity.

Table Caption: This table appears to be an index from a document, listing specific topics like "Recycling," "Battery," and "Display" along with their corresponding page numbers.

1 Product description

Table Caption: This table compares the specifications of three HP ProBook models: the 4520s with UMA graphics, the 4520s with discrete graphics, and the 4720s with discrete graphics, detailing product names, available processors, chipsets, graphics options, and panel features.

**Table Caption: This table compares the display and memory specifications of three HP ProBook models: the 4520s with UMA graphics,