HP Compaq Presario CQ45 Schematic

Compaq Presario CQ45 Notebook PC

Display Replacement Guide

© Copyright 2009 Hewlett-Packard
Development Company, L.P.

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The information contained herein is subject
to change without notice. The only
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constituting an additional warranty. HP shall
not be liable for technical or editorial errors
or omissions contained herein.

First Edition: September 2009

Document Part Number: 592772-001

Table of contents

1 Removal and replacement procedures

Preliminary replacement requirements ................................................................................................. 2

Tools required ...................................................................................................................... 2

Service considerations ......................................................................................................... 2

Plastic parts ......................................................................................................... 2

Cables and connectors ....................................................................................... 3

Drive handling ..................................................................................................... 3

Grounding guidelines ........................................................................................................... 4

Electrostatic discharge damage .......................................................................... 4

Component replacement procedures ................................................................................................... 5

Display assembly ................................................................................................................. 5

2 Recycling

Display ................................................................................................................................................ 17

Index ................................................................................................................................................................... 23

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iv ENWW

1 Removal and replacement procedures

ENWW 1

Preliminary replacement requirements

Tools required

You will need the following tools to complete the removal and replacement procedures:

Flat-bladed screwdriver

●

Magnetic screwdriver

●

Phillips P0 and P1 screwdrivers

●

Service considerations

The following sections include some of the considerations that you must keep in mind during
disassembly and assembly procedures.

NOTE: As you remove each subassembly from the computer, place the subassembly (and all

accompanying screws) away from the work area to prevent damage.

Plastic parts

Using excessive force during disassembly and reassembly can damage plastic parts. Use care when
handling the plastic parts. Apply pressure only at the points designated in the maintenance instructions.

2 Chapter 1 Removal and replacement procedures ENWW

Cables and connectors

CAUTION: When servicing the computer, be sure that cables are placed in their proper locations

during the reassembly process. Improper cable placement can damage the computer.

Cables must be handled with extreme care to avoid damage. Apply only the tension required to unseat
or seat the cables during removal and insertion. Handle cables by the connector whenever possible. In
all cases, avoid bending, twisting, or tearing cables. Be sure that cables are routed in such a way that
they cannot be caught or snagged by parts being removed or replaced. Handle flex cables with extreme
care; these cables tear easily.

Drive handling

CAUTION: Drives are fragile components that must be handled with care. To prevent damage to the

computer, damage to a drive, or loss of information, observe these precautions:

Before removing or inserting a hard drive, shut down the computer. If you are unsure whether the
computer is off or in Hibernation, turn the computer on, and then shut it down through the operating
system.

Before handling a drive, be sure that you are discharged of static electricity. While handling a drive,
avoid touching the connector.

Before removing a diskette drive or optical drive, be sure that a diskette or disc is not in the drive and
be sure that the optical drive tray is closed.

Handle drives on surfaces covered with at least one inch of shock-proof foam.

Avoid dropping drives from any height onto any surface.

After removing a hard drive, an optical drive, or a diskette drive, place it in a static-proof bag.

Avoid exposing a hard drive to products that have magnetic fields, such as monitors or speakers.

Avoid exposing a drive to temperature extremes or liquids.

If a drive must be mailed, place the drive in a bubble pack mailer or other suitable form of protective
packaging and label the package “FRAGILE.”

ENWW Preliminary replacement requirements 3

Grounding guidelines

Electrostatic discharge damage

Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure
determine the degree of sensitivity. Networks built into many integrated circuits provide some protection,
but in many cases, ESD contains enough power to alter device parameters or melt silicon junctions.

A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or
microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred.

An electronic device exposed to ESD may not be affected at all and can work perfectly throughout a
normal cycle. Or the device may function normally for a while, then degrade in the internal layers,
reducing its life expectancy.

CAUTION: To prevent damage to the computer when you are removing or installing internal

components, observe these precautions:

Keep components in their electrostatic-safe containers until you area ready to install them.

Use nonmagnetic tools.

Before touching an electronic component, discharge static electricity by using the guidelines described
in this section.

Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.

If you remove a component, place it in an electrostatic-safe container.

4 Chapter 1 Removal and replacement procedures ENWW

Component replacement procedures

Display assembly

Description Spare part number

14.1-inch, WXGA, BrightView display assembly for use only in computer models with a camera
module (includes microphones)

14.1-inch, WXGA, BrightView display assembly for use only in computer models without a camera
module (includes microphones)

486728-001

486729-001

Remove the display assembly:

1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the

computer on, and then shut it down through the operating system.

2. Disconnect all external devices connected to the computer.

3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and

then unplugging the AC adapter from the computer.

4. Turn the computer upside down on a flat surface.

5. Slide the battery release latch (1) to release the battery.

6. Pivot the battery (2) upward and lift it out of the computer (3).

7. Position the computer with the right side toward you.

8. Remove the Phillips PM2.5×6.0 screw (1) that secures the optical drive to the computer.

9. Insert a thin tool, such as a paper clip (2), into the release access. (The optical drive media tray is

partially ejected from the optical drive.)

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