Dell 14 Manuel de service Page 1

Inspiron 147000 SeriesService ManualComputer Model: Inspiron 7447Regulatory Model: P55GRegulatory Type: P55G001

WARNING: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, p

Recommended ToolsThe procedures in this document may require the following tools:• Philips screwdriver• Plastic scribe11

After Working Inside Your ComputerCAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.1 Replace all screws

Removing the BatteryWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in

Replacing the BatteryWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in

2 Press the battery down until it snaps into place.1 battery 2 computer base3 Turn the computer over and open the display as far as possible.15

Removing the Base CoverWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

Replacing the Base CoverWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

Removing the Optical DriveWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the ste

2 Using your fingertips, slide the optical-drive assembly out of the optical-drive bay.1 optical-drive assembly 2 screw3 Carefully pull the optical-

Notes, Cautions, and WarningsNOTE: A NOTE indicates important information that helps you make better use of your computer.CAUTION: A CAUTION indicates

4 Remove the screw that secures the optical-drive bracket to the optical-drive assembly and remove the optical-drive bracket.1 optical-drive bezel 2

Replacing the Optical DriveWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the st

Removing the Memory Module(s)WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the

2 Slide and remove the memory module from the memory-module slot.1 securing clips (2) 2 memory-module slot3 memory module23

Replacing the Memory Module(s)WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the

2 Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place.NOTE: If you do not hear the c

Removing the Hard DriveWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

3 Gently lift the hard-drive assembly out of the computer base.1 pull-tab 2 hard-drive assembly3 screws (4)4 Disconnect the interposer from the hard

6 Lift the hard drive out of the hard-drive bracket.1 screws (4) 2 interposer3 hard-drive bracket 4 hard drive28

Replacing the Hard DriveWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

ContentsBefore Working Inside Your Computer...9Before You Begin ...

Removing the KeyboardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in

3 Turn the keyboard over and place it on the palm rest.1 plastic scribe 2 keyboard3 tabs (5)31

4 Lift the latches and disconnect the keyboard cable and the keyboard-backlight cable from the system board.1 keyboard cable 2 latches (2)3 keyboard-

Replacing the KeyboardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps i

NOTE: Keyboard-backlight cable is present only on a backlit-keyboard.1 Place the keyboard on a flat and clean surface.1 keyboard cable 2 keyboard3 ke

2 Gently fold the keyboard-backlight cable till the edge of the keyboard cable as shown in the image.1 keyboard cable 2 keyboard-backlight cable35

3 Gently fold the keyboard cable with the end aligned at the fold line as shown in the image.1 keyboard cable 2 keyboard-backlight cable3 fold line1

Removing the Wireless CardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the ste

3 Slide and remove the wireless card out of the wireless-card slot.1 wireless-card slot 2 antenna cables (2)3 wireless card 4 screw38

Replacing the Wireless CardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the st

Removing the Memory Module(s)...22Prerequisites...

Removing the Palm RestWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps i

2 Lift the latch, and using the pull-tab, disconnect the touchpad cable from the system board.1 screws (3) 2 latch3 pull-tab 4 touchpad cable3 Close

5 Disconnect the hard-drive cable from the system board.1 computer base 2 screws (12)3 hard-drive cable42

6 Using a plastic scribe, release the tabs on the palm rest from the slots on the computer base.1 tabs (8) 2 computer base3 palm rest 4 plastic scrib

8 Lift the palm rest at an angle and remove it from the computer base.1 palm rest 2 computer base44

Replacing the Palm RestWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

Removing the Coin-Cell BatteryWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the

1 plastic scribe 2 coin-cell battery3 battery socket 4 system board47

Replacing the Coin-Cell BatteryWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow th

Removing the I/O BoardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps i

Removing the Palm Rest...40Prerequisites...

3 Lift the I/O board off the computer base.1 screws (2) 2 I/O board3 pull-tab 4 I/O-board cable50

Replacing the I/O BoardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

Removing the FanWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Befo

5 Lift the fan off the computer base.1 screw 2 fan3 speaker cable 4 fan cable53

Replacing the FanWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in Bef

Removing the System BoardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the step

4 Disconnect the power-adapter port cable from the connector on the system board.1 I/O-board cable 2 pull-tab3 power-adapter port cable 4 tape5 displ

5 Lift the system board at an angle and release the ports from the slots on the computer base.1 system board 2 computer base6 Turn the system board

7 Disconnect the I/O-board cable from the system board.1 I/O-board cable 2 system board58

Replacing the System BoardWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the ste

Removing the System Board... 55Prerequisites...

Entering the Service Tag in the BIOS1 Turn on the computer.2 Press F2 when the DELL logo is displayed to enter the BIOS setup program.3 Navigate to

Removing the Heat SinkWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps i

3 Lift the heat sink off the system board.1 heat-sink 2 captive screws (7)62

Replacing the Heat SinkWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps

Removing the Power-Adapter PortWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow th

3 Lift the power-adapter port along with its cable off the computer base.1 power-adapter port 2 power-adapter port cable65

Replacing the Power-Adapter PortWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow t

Removing the Display AssemblyWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the

7 Note the I/O-board cable routing and remove the cable from its routing guide.1 tapes (2) 2 display cable3 antenna cables (2) 4 I/O-board cable8 Re

9 Lift the display assembly off the computer base.1 display assembly 2 screws (4)3 computer base69

Removing the Display Bezel... 71Prerequisites...

Replacing the Display AssemblyWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the

Removing the Display BezelWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the ste

2 Remove the display bezel off the display back-cover.1 display bezel 2 display back-cover72

Replacing the Display BezelWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the st

Removing the Display PanelWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the ste

Procedure1 Remove the screws that secure the display panel to the display back-cover.1 screws (4) 2 display back-cover3 display panel75

2 Gently lift the display panel and turn it over.1 display panel 2 display back-cover3 Peel off the tape and disconnect the display cable from the d

4 Lift the display panel away from the display back-cover.77

Replacing the Display PanelWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the st

Removing the Display Hinge and Bracket AssemblyWARNING: Before working inside your computer, read the safety information that shipped with your comput

Removing the Speakers...85Prerequisites...

2 Lift the display hinge and bracket assembly off the display back-cover.1 screws (10) 2 display hinge and bracket assembly (2)80

Replacing the Display Hinge and Bracket AssemblyWARNING: Before working inside your computer, read the safety information that shipped with your compu

Removing the CameraWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in B

4 Disconnect the camera cable from the camera.1 camera cable 2 camera3 plastic scribe 4 tape83

Replacing the CameraWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in

Removing the SpeakersWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in

3 Lift the speakers, along with the speaker cable, off the computer base.1 speaker cable 2 speaker-cable routing3 rubber grommets (6) 4 speakers (2)8

Replacing the SpeakersWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps i

Flashing the BIOSYou may need to flash (update) the BIOS when an update is available or when you replace the system board. To flash the BIOS:1 Turn o

Getting Help and Contacting DellSelf-Help ResourcesYou can get information and help on Dell products and services using these online self-help resourc

Before Working Inside Your ComputerCAUTION: To avoid damaging the components and cards, handle them by their edges and avoid touching pins and contact

NOTE: If you do not have an active internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product