Dell Inspiron 11 3185 2-in-1 User manual

Inspiron 3185

Service Manual

Regulatory Model: P25T

Regulatory Type: P25T003

September 2020

Rev. A01

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid

the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

subsidiaries. Other trademarks may be trademarks of their respective owners.

Chapter 1: Before working inside your computer........................................................................... 8

Before you begin .................................................................................................................................................................8

Safety instructions.............................................................................................................................................................. 8

Recommended tools........................................................................................................................................................... 9

Screw list............................................................................................................................................................................... 9

Chapter 2: After working inside your computer............................................................................10

Chapter 3: Removing the base cover............................................................................................ 11

Procedure............................................................................................................................................................................. 11

Chapter 4: Replacing the base cover............................................................................................ 13

Procedure.............................................................................................................................................................................13

Chapter 5: Removing the battery................................................................................................. 14

Lithium-ion battery precautions..................................................................................................................................... 14

Prerequisites........................................................................................................................................................................14

Procedure.............................................................................................................................................................................14

Chapter 6: Replacing the battery................................................................................................. 16

Procedure.............................................................................................................................................................................16

Post-requisites....................................................................................................................................................................16

Chapter 7: Removing the power and volume-buttons board..........................................................17

Prerequisites........................................................................................................................................................................17

Procedure.............................................................................................................................................................................17

Chapter 8: Replacing the power and volume-buttons board......................................................... 19

Procedure.............................................................................................................................................................................19

Post-requisites....................................................................................................................................................................19

Chapter 9: Removing the power-adapter port..............................................................................20

Prerequisites.......................................................................................................................................................................20

Procedure............................................................................................................................................................................20

Chapter 10: Replacing the power-adapter port............................................................................ 22

Procedure............................................................................................................................................................................22

Post-requisites................................................................................................................................................................... 22

Chapter 11: Removing the hard drive........................................................................................... 23

Prerequisites.......................................................................................................................................................................23

Procedure............................................................................................................................................................................23

Contents

Contents 3

Chapter 12: Replacing the hard drive........................................................................................... 25

Procedure............................................................................................................................................................................25

Post-requisites...................................................................................................................................................................25

Chapter 13: Removing the I/O board............................................................................................26

Prerequisites.......................................................................................................................................................................26

Procedure............................................................................................................................................................................26

Chapter 14: Replacing the I/O board............................................................................................28

Procedure............................................................................................................................................................................28

Post-requisites...................................................................................................................................................................28

Chapter 15: Removing the wireless card...................................................................................... 29

Prerequisites.......................................................................................................................................................................29

Procedure............................................................................................................................................................................29

Chapter 16: Replacing the wireless card.......................................................................................31

Procedure.............................................................................................................................................................................31

Post-requisites................................................................................................................................................................... 32

Chapter 17: Removing the coin-cell battery................................................................................. 33

Prerequisites.......................................................................................................................................................................33

Procedure............................................................................................................................................................................33

Chapter 18: Replacing the coin-cell battery................................................................................. 35

Procedure............................................................................................................................................................................35

Post-requisites...................................................................................................................................................................35

Chapter 19: Removing the speakers.............................................................................................36

Prerequisites.......................................................................................................................................................................36

Procedure............................................................................................................................................................................36

Chapter 20: Replacing the speakers............................................................................................ 38

Procedure............................................................................................................................................................................38

Post-requisites...................................................................................................................................................................38

Chapter 21: Removing the heat sink.............................................................................................39

Prerequisites.......................................................................................................................................................................39

Procedure............................................................................................................................................................................39

Chapter 22: Replacing the heat sink.............................................................................................41

Procedure.............................................................................................................................................................................41

Post-requisites....................................................................................................................................................................41

Chapter 23: Removing the memory module..................................................................................42

Prerequisites.......................................................................................................................................................................42

Procedure............................................................................................................................................................................42

4

Contents

Chapter 24: Replacing the memory module..................................................................................43

Procedure............................................................................................................................................................................43

Post-requisites................................................................................................................................................................... 43

Chapter 25: Removing the touchpad........................................................................................... 45

Prerequisites.......................................................................................................................................................................45

Procedure............................................................................................................................................................................45

Chapter 26: Replacing the touchpad............................................................................................47

Procedure............................................................................................................................................................................ 47

Post-requisites................................................................................................................................................................... 47

Chapter 27: Removing the display assembly................................................................................ 48

Prerequisites.......................................................................................................................................................................48

Procedure............................................................................................................................................................................48

Chapter 28: Replacing the display assembly................................................................................ 52

Procedure............................................................................................................................................................................52

Post-requisites...................................................................................................................................................................52

Chapter 29: Removing the system board..................................................................................... 53

Prerequisites.......................................................................................................................................................................53

Procedure............................................................................................................................................................................53

Chapter 30: Replacing the system board..................................................................................... 58

Procedure............................................................................................................................................................................58

Post-requisites...................................................................................................................................................................58

Entering the Service Tag in the BIOS setup program..............................................................................................58

Chapter 31: Removing the palm-rest and keyboard assembly.......................................................59

Prerequisites.......................................................................................................................................................................59

Procedure............................................................................................................................................................................59

Chapter 32: Replacing the palm-rest and keyboard assembly....................................................... 61

Procedure.............................................................................................................................................................................61

Post-requisites....................................................................................................................................................................61

Chapter 33: Removing the display panel...................................................................................... 62

Prerequisites.......................................................................................................................................................................62

Procedure............................................................................................................................................................................62

Chapter 34: Replacing the display panel...................................................................................... 64

Procedure............................................................................................................................................................................64

Post-requisites...................................................................................................................................................................64

Chapter 35: Removing the display hinges.................................................................................... 65

Prerequisites.......................................................................................................................................................................65

Contents

5

Procedure............................................................................................................................................................................65

Chapter 36: Replacing the display hinges.................................................................................... 67

Procedure............................................................................................................................................................................67

Post-requisites................................................................................................................................................................... 67

Chapter 37: Removing the camera............................................................................................... 68

Prerequisites.......................................................................................................................................................................68

Procedure............................................................................................................................................................................68

Chapter 38: Replacing the camera................................................................................................71

Procedure.............................................................................................................................................................................71

Post-requisites....................................................................................................................................................................71

Chapter 39: Removing the sensor board...................................................................................... 72

Prerequisites....................................................................................................................................................................... 72

Procedure............................................................................................................................................................................ 72

Chapter 40: Replacing the sensor board...................................................................................... 74

Procedure............................................................................................................................................................................ 74

Post-requisites................................................................................................................................................................... 74

Chapter 41: Downloading drivers................................................................................................. 75

Downloading the audio driver......................................................................................................................................... 75

Downloading the video driver.........................................................................................................................................75

Downloading the USB driver...........................................................................................................................................76

Network adapter and Bluetooth drivers...................................................................................................................... 76

Downloading the network driver....................................................................................................................................77

Chapter 42: System setup........................................................................................................... 78

Boot Sequence...................................................................................................................................................................78

Navigation keys..................................................................................................................................................................78

BIOS overview....................................................................................................................................................................79

Entering BIOS setup program........................................................................................................................................ 79

System setup options....................................................................................................................................................... 79

Chapter 43: System and setup password..................................................................................... 83

Assigning a system password and setup password.................................................................................................. 83

Deleting or changing an existing system and or setup password..........................................................................83

Clearing CMOS settings.................................................................................................................................................. 84

Clearing forgotten passwords........................................................................................................................................ 84

Chapter 44: Troubleshooting....................................................................................................... 85

SupportAssist diagnostics...............................................................................................................................................85

Locate the Service Tag or Express Service Code of your Dell computer ..............................................85

Recovering the operating system................................................................................................................................. 85

Flashing the BIOS..............................................................................................................................................................86

Flashing BIOS (USB key).................................................................................................................................................86

6

Contents

Beep codes......................................................................................................................................................................... 86

Flea power release............................................................................................................................................................ 87

Wi-Fi power cycle..............................................................................................................................................................87

Chapter 45: Getting help and contacting Dell.............................................................................. 88

Contents 7

Before working inside your computer

NOTE: The images in this document may differ from your computer depending on the configuration you ordered.

Topics:

• Before you begin

• Safety instructions

• Recommended tools

• Screw list

Before you begin

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

2. Shut down your computer. Click Start >

Power > Shut down.

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

instructions.

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

4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.

5. Remove any media card and optical disc from your computer, if applicable.

Safety instructions

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

NOTE:

Before working inside your computer, read the safety information that shipped with your computer. For more safety

best practices, see the Regulatory Compliance home page at www.dell.com/regulatory_compliance.

NOTE: 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 electrical outlet.

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.

CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical

assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the

safety instructions that shipped with the product or at www.dell.com/regulatory_compliance.

CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal

surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal

surface to dissipate static electricity, which could harm internal components.

CAUTION: When you disconnect a cable, pull on its connector or on its pull tab, not on the cable itself. Some

cables have connectors with locking tabs or thumb-screws that you must disengage before disconnecting the

cable. When disconnecting cables, keep them evenly aligned to avoid bending any connector pins. When

connecting cables, ensure that the ports and connectors are correctly oriented and aligned.

CAUTION: Press and eject any installed card from the media-card reader.

1

8 Before working inside your computer

Recommended tools

The procedures in this document may require the following tools:

● Phillips screwdriver #1

● Plastic scribe

Screw list

Table 10. Screw list

Component Secured to Screw type Quantity Screw image

Back cover Palm-rest and keyboard

assembly

M2.5x7 9

Battery Palm-rest and keyboard

assembly

M2x3 1

Display cable bracket Palm-rest and keyboard

assembly

M2x2 (Big head) 1

Hard drive Palm-rest and keyboard

assembly

M3x3 1

Hard-drive bracket Hard drive M3x3 4

Hinges Palm-rest and keyboard

assembly

M2.5x5 4

Hinge plate Cover M2.5x2.5

(Big head)

4

I/O board Palm-rest and keyboard

assembly

M2x3 2

Power adapter Palm-rest and keyboard

assembly

M2x3 1

System board Palm-rest and keyboard

assembly

M2x2 (Big Head) 1

Touch pad Palm-rest and keyboard

assembly

M2x2 4

Wireless card Palm-rest and keyboard

assembly

M2x3 1

Before working inside your computer 9

After working inside your computer

CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.

1. Replace all screws and ensure that no stray screws remain inside your computer.

2. Connect any external devices, peripherals, or cables you removed before working on your computer.

3. Replace any media cards, discs, or any other parts that you removed before working on your computer.

4. Connect your computer and all attached devices to their electrical outlets.

5. Turn on your computer.

2

10 After working inside your computer

Removing the base cover

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Procedure

Procedure

1. Close the display and turn the computer over.

2. Using a plastic scribe, pry the screw cover from the base cover.

Figure 37. Removing the screw cover

a. base cover

b. screw cover

c. plastic scribe

3. Remove the nine screws (M2.5x7) that secure the base cover to the palm-rest and keyboard assembly.

3

Removing the base cover 11

Figure 38. Removing the screws from the base cover

a. M2.5x7 screws (9)

b. base cover

4. Using a plastic scribe, pry the base cover from the palm-rest and keyboard assembly.

Figure 39. Removing the base cover

a. plastic scribe

b. base cover

12

Removing the base cover

Replacing the base cover

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Procedure

Procedure

1. Slide the tabs on the base cover into the slots on the palm-rest and keyboard assembly and snap the base cover into place.

2. Replace the nine screws (M2.5x7) that secure the base cover to the palm-rest and keyboard assembly.

3. Replace the screw cover into its slot on the base cover.

4

Replacing the base cover 13

Removing the battery

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Lithium-ion battery precautions

• Prerequisites

• Procedure

Lithium-ion battery precautions

CAUTION:

● Exercise caution when handling Lithium-ion batteries.

● Discharge the battery completely before removing it. Disconnect the AC power adapter from the system and

operate the computer solely on battery power—the battery is fully discharged when the computer no longer

turns on when the power button is pressed.

● Do not crush, drop, mutilate, or penetrate the battery with foreign objects.

● Do not expose the battery to high temperatures, or disassemble battery packs and cells.

● Do not apply pressure to the surface of the battery.

● Do not bend the battery.

● Do not use tools of any kind to pry on or against the battery.

● Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental

puncture or damage to the battery and other system components.

● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing,

bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical

support for assistance. See www.dell.com/contactdell.

● Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers.

Prerequisites

Remove the base cover.

Procedure

1. Remove the screw (M2x3) that secures the battery to the palm-rest and keyboard assembly.

2. Disconnect the battery cable from the system board.

3. Lift the battery off the palm-rest and keyboard assembly.

5

14 Removing the battery

Figure 40. Removing the battery

1. battery cable 2. screw (M2x3)

3. battery 4. palm-rest and keyboard assembly

4. Turn the computer over.

5. Press and hold the power button for five seconds to ground the system board.

Removing the battery

15

Replacing the battery

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Procedure

• Post-requisites

Procedure

1. Align the screw hole on the battery with the screw hole on the palm-rest and keyboard assembly.

2. Replace the screw (M2X3) that secures the battery to the palm-rest and keyboard assembly.

3. Connect the battery cable to the system board.

Post-requisites

Replace the base cover.

6

16 Replacing the battery

Removing the power and volume-buttons

board

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Prerequisites

• Procedure

Prerequisites

1. Remove the base cover.

2. Remove the battery.

Procedure

1. Open the latch and disconnect the power and volume-buttons board cable from the I/O board.

2. Peel the tape that secures the power and volume-buttons board to the palm-rest and keyboard assembly.

3. Using a plastic scribe, pry the power and volume-buttons board, along with its cable, off the palm-rest and keyboard

assembly.

Figure 41. Removing the power and volume-buttons board

1.

power and volume-buttons board cable 2. latch

3. tape 4. plastic scribe

7

Removing the power and volume-buttons board 17

5. power and volume-buttons board 6. palm-rest and keyboard assembly

18 Removing the power and volume-buttons board

Replacing the power and volume-buttons

board

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Procedure

• Post-requisites

Procedure

1. Place the power and volume-buttons board into the slot on the palm-rest and keyboard assembly.

2. Adhere the tape that secures the power and volume-buttons board to the palm-rest and keyboard assembly.

3. Slide the power and volume-buttons board cable into the connector on the I/O board and close the latch to secure the

cable.

Post-requisites

1. Replace the battery.

2. Replace the base cover.

8

Replacing the power and volume-buttons board 19

Removing the power-adapter port

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

steps in Before working inside your computer. After working inside your computer, follow the instructions in After working

inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/

regulatory_compliance.

Topics:

• Prerequisites

• Procedure

Prerequisites

1. Remove the base cover.

2. Remove the battery.

Procedure

1. Disconnect the power-adapter port cable from the system board.

2. Remove the screw (M2x3) that secures the power-adapter port to the palm-rest and keyboard assembly.

3. Lift the power-adapter port with its cable, off the palm-rest and keyboard assembly.

9

20 Removing the power-adapter port

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Dell Inspiron 11 3185 2-in-1 User manual

Dell Inspiron 11 3185 2-in-1 User manual

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