Dell P28F001 manual Before You Begin, Turn Off Your Computer and Connected Devices

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Before You Begin

Turn Off Your Computer and Connected Devices

CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.

1Save and close all open files and exit all open programs.

2Follow the instructions to shut down your computer based on the operating system installed on your computer.

Windows 8:

Move your mouse pointer to the upper-right or lower-right corner of the screen to open the Charms sidebar, and then click SettingsPowerShutdown.

Windows 7:

Click Start and click Shut down.

Microsoft Windows shuts down and then the computer turns off.

NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down instructions.

3Disconnect your computer and all attached devices from their electrical outlets.

4Disconnect all telephone cables, network cables, and attached devices from your computer.

5Press and hold the power button for 5 seconds, after the computer is unplugged, to ground the system board.

Safety Instructions

Use the following safety guidelines to protect your computer from potential damage and ensure your personal safety.

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at dell.com/regulatory_compliance.

WARNING: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting to the power source.

CAUTION: To avoid damaging the computer, ensure that the work surface is flat and clean.

CAUTION: To avoid damaging the components and cards, handle them by their edges and avoid touching pins and contacts.

Before You Begin

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Contents Dell Inspiron 3521/5521 2012 Contents Removing the Wireless Mini-Card Removing the Coin-Cell Battery Removing the Display Bezel Turn Off Your Computer and Connected Devices Before You BeginRecommended Tools After Working Inside Your Computer After Working Inside Your Computer Procedure Removing the BatteryRemoving the Battery Postrequisites Replacing the BatteryReplacing the Battery Removing the Memory Modules Securing clips Memory-module connector Memory module Replacing the Memory Modules Replacing the Memory Modules Removing the Optical-Drive Assembly Removing the Optical-Drive Assembly Replacing the Optical-Drive Assembly Replacing the Optical-Drive Assembly Removing the Hard-Drive Assembly Hard-drive assembly Pull-tab Replacing the Hard-Drive Assembly Replacing the Hard-Drive Assembly Removing the Keyboard Connector latch Replacing the Keyboard Replacing the Keyboard Removing the Palm-Rest Touchpad cable Power-button cable Connector latches Screws Palm-rest Removing the Palm-Rest Replacing the Palm-Rest Replacing the Palm-Rest Removing the Wireless Mini-Card Wireless mini-card Replacing the Wireless Mini-Card Postrequisites Removing the I/O Board Board Board cable Screw Replacing the I/O Board Replacing the I/O Board Removing the System Board Procedure System board Screw Removing the System Board Replacing the System Board Entering the Service Tag in system setupReplacing the System Board Removing the Coin-Cell Battery Plastic scribe Coin-cell battery Replacing the Coin-Cell Battery Replacing the Coin-Cell Battery Removing the Heat-Sink Screw Fan Replacing the Heat-Sink Replacing the Heat-Sink Removing the Fan Fan cable Replacing the Fan Replacing the Fan Removing the Speakers Tape LED silicon tubes Speaker cable routing Speakers Removing the Speakers Replacing the Speakers Replacing the Speakers Removing the Display Assembly Display cable Wireless mini-card cables Display assembly Removing the Display Assembly Replacing the Display Assembly Replacing the Display Assembly Removing the Display Bezel Hinge covers Replacing the Display Bezel Replacing the Display Bezel Removing the Display Hinges Screws Display hinges Replacing the Display Hinges Replacing the Display Hinges Removing the Display Panel Display back-cover Display cable Tape Removing the Display Panel Replacing the Display Panel Replacing the Display Panel Removing the Camera Module Screw Camera module Tape Camera cable Replacing the Camera Module Replacing the Camera Module Flashing the Bios Flashing the Bios