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Inspiron 27 7775
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Table of contents
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Dell Inspiron 27 7775 User Manual

Inspiron 27 7000
Service Manual
Computer Model: Inspiron 27-7775 Regulatory Model: W16C Regulatory Type: W16C001
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
Copyright © 2017 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other
trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
2017 - 05
Rev. A00
Contents
Before working inside your computer............................ 11
Before you begin ......................................................................................11
Safety instructions...................................................................................12
Recommended tools................................................................................ 13
Screw list................................................................................................. 13
After working inside your computer..............................16
Technical overview........................................................17
Inside view of your computer...................................................................18
System-board components ..................................................................... 19
Removing the back cover............................................. 21
Procedure................................................................................................ 21
Replacing the back cover.............................................23
Procedure................................................................................................23
Removing the stand..................................................... 24
Prerequisites............................................................................................24
Procedure................................................................................................24
Replacing the stand..................................................... 26
Procedure............................................................................................... 26
Post-requisites........................................................................................ 26
3
Removing the hard drive.............................................. 27
Prerequisites............................................................................................27
Procedure................................................................................................27
Replacing the hard drive.............................................. 30
Procedure............................................................................................... 30
Post-requisites........................................................................................ 30
Removing the inner frame............................................ 31
Prerequisites............................................................................................ 31
Procedure................................................................................................32
Replacing the inner frame............................................35
Procedure............................................................................................... 35
Post-requisites........................................................................................ 35
Removing the camera.................................................. 36
Prerequisites........................................................................................... 36
Procedure............................................................................................... 36
Replacing the camera.................................................. 38
Procedure............................................................................................... 38
Post-requisites........................................................................................ 38
Removing the microphones..........................................39
Prerequisites........................................................................................... 39
Procedure............................................................................................... 39
Replacing the microphones...........................................41
Procedure................................................................................................ 41
Post-requisites......................................................................................... 41
4
Removing the power-button board...............................42
Prerequisites............................................................................................42
Procedure................................................................................................42
Replacing the power-button board...............................44
Procedure................................................................................................44
Post-requisites........................................................................................ 44
Removing the front bezel ............................................45
Prerequisites........................................................................................... 45
Procedure............................................................................................... 46
Replacing the front bezel............................................. 48
Procedure............................................................................................... 48
Post-requisites........................................................................................ 48
Removing the media-card reader................................. 49
Prerequisites........................................................................................... 49
Procedure............................................................................................... 49
Replacing the media-card reader................................. 53
Procedure............................................................................................... 53
Post-requisites........................................................................................ 53
Removing the side I/O-board.......................................55
Prerequisites........................................................................................... 55
Procedure............................................................................................... 55
Replacing the side I/O-board....................................... 57
Procedure................................................................................................57
Post-requisites........................................................................................ 57
5
Removing the system-board shield.............................. 58
Prerequisites........................................................................................... 58
Procedure............................................................................................... 58
Replacing the system-board shield.............................. 60
Procedure............................................................................................... 60
Post-requisites........................................................................................ 60
Removing the fan......................................................... 61
Prerequisites............................................................................................ 61
Procedure................................................................................................61
Replacing the fan.........................................................63
Procedure............................................................................................... 63
Post-requisites........................................................................................ 63
Removing the speakers................................................64
Prerequisites........................................................................................... 64
Procedure .............................................................................................. 64
Replacing the speakers................................................66
Procedure .............................................................................................. 66
Post-requisites........................................................................................ 66
Removing the subwoofer............................................. 67
Prerequisites............................................................................................67
Procedure ...............................................................................................67
Replacing the subwoofer............................................. 69
Procedure .............................................................................................. 69
Post-requisites........................................................................................ 69
6
Removing the coin-cell battery.................................... 70
Prerequisites............................................................................................70
Procedure................................................................................................70
Replacing the coin-cell battery.....................................72
Procedure................................................................................................72
Post-requisites........................................................................................ 72
Removing the memory modules................................... 73
Prerequisites............................................................................................73
Procedure................................................................................................74
Replacing the memory modules................................... 76
Procedure................................................................................................76
Post-requisites.........................................................................................77
Removing the solid-state drive.....................................78
Prerequisites............................................................................................78
Procedure................................................................................................79
Replacing the solid-state drive..................................... 81
Procedure................................................................................................ 81
Post-requisites......................................................................................... 81
Removing the wireless card......................................... 82
Prerequisites............................................................................................82
Procedure............................................................................................... 83
Replacing the wireless card..........................................85
Procedure............................................................................................... 85
Post-requisites........................................................................................ 86
7
Removing the heat sink................................................87
Prerequisites............................................................................................87
Procedure................................................................................................87
Replacing the heat sink................................................89
Procedure............................................................................................... 89
Post-requisites........................................................................................ 89
Removing the processor...............................................91
Prerequisites............................................................................................ 91
Procedure............................................................................................... 92
Replacing the processor.............................................. 94
Procedure............................................................................................... 94
Post-requisites........................................................................................ 95
Removing the I/O bracket............................................96
Prerequisites........................................................................................... 96
Procedure............................................................................................... 96
Replacing the I/O bracket............................................98
Procedure............................................................................................... 98
Post-requisites........................................................................................ 98
Removing the I/O board.............................................. 99
Prerequisites........................................................................................... 99
Procedure............................................................................................... 99
Replacing the I/O board............................................. 103
Procedure..............................................................................................103
Post-requisites.......................................................................................103
8
Removing the system board....................................... 105
Prerequisites..........................................................................................105
Procedure..............................................................................................106
Replacing the system board....................................... 109
Procedure..............................................................................................109
Post-requisites....................................................................................... 110
Removing the middle frame......................................... 111
Prerequisites............................................................................................111
Procedure...............................................................................................112
Replacing the middle frame.........................................113
Procedure...............................................................................................113
Post-requisites........................................................................................116
Removing the display panel.........................................118
Prerequisites...........................................................................................118
Procedure...............................................................................................118
Replacing the display panel.........................................122
Procedure..............................................................................................122
Post-requisites.......................................................................................126
Flashing the BIOS....................................................... 127
BIOS setup program................................................... 128
BIOS overview.......................................................................................128
Entering BIOS setup program................................................................ 128
System setup options............................................................................ 129
Clearing forgotten passwords................................................................ 134
Prerequisites.................................................................................... 134
9
Procedure........................................................................................135
Post-requisites.................................................................................135
Clearing CMOS settings........................................................................ 136
Prerequisites.................................................................................... 136
Procedure........................................................................................136
Post-requisites................................................................................. 137
Diagnostics.................................................................138
Getting help and contacting Dell.................................140
Self-help resources................................................................................ 140
Contacting Dell.......................................................................................141
10
Identifier GUID-5D3B1051-9384-409A-8D5B-9B53BD496DE8
Status Released

Before working inside your computer

NOTE: The images in this document may dier from your computer depending on the conguration you ordered.
Identifier GUID-0CBCCCC8-AEDC-4C92-992B-45062AB0B176
Status Released

Before you begin

1 Save and close all open les and exit all open applications.
2 Shut down your computer. Click Start → Power → Shut down.
NOTE: If you are using a dierent 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.
6 After the computer is unplugged, press and hold the power button for 5 seconds
to ground the system board.
CAUTION: Place the computer on a at, soft, and clean surface to avoid scratches on the display.
7 Place the computer face down.
11
Identifier GUID-71128823-CE64-4E17-9439-DEE95AF668C4
Status Released

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 more safety best practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish 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 at 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.
12
CAUTION: Press and eject any installed card from the media-card reader.
Identifier GUID-DEA55279-6FE6-4A1F-A152-21F8A5572B33
Status Released

Recommended tools

The procedures in this document may require the following tools:
• Phillips screwdriver
• Plastic scribe
Identifier GUID-7A78925A-E09E-447B-800A-3DC937EF2DD5
Status Released

Screw list

Table 1. Screw list
Component Secured to Screw
Stand Middle frame M4x6 6
Hard-drive bracket
Hard drive Hard-drive
System-board shield
Fan Middle frame M3x5 3
Solid-state drive System board M2x3.5 1
Middle frame M3x5 1
bracket
System board M3x5 6
type
M3x3.5 3
Quantity Screw image
13
Component Secured to Screw
Wireless card bracket
Heat sink Middle frame M3x5 1
Inner frame Middle frame M3x5 8
System board Middle frame M3x5 5
System board M2x3.5 1
type
Quantity Screw image
Microphone board
Subwoofer Middle frame Washer
Side I/O-board bracket
Media-card reader
Side I/O-board Side I/O-board
Camera Front bezel M3x5 2
I/O bracket Middle frame M3x5 9
Power-button board
Middle frame M2x4 4
type M3x4
Middle frame M3x5 2
Side I/O-board bracket
bracket
Middle frame M2x3.5 2
M3x5 2
M3x5 2
4
14
Component Secured to Screw
type
I/O board Middle frame M3x5 4
Middle frame Display M3x5 8
Quantity Screw image
Front bezel Middle frame Step type
M3x5.6
6
15
Identifier GUID-06588814-2678-4667-9FF9-C009F4BCE185
Status Released

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.
16
Identifier GUID-93575C2B-9DA3-42EF-B01E-9C841B3CE7F5
Status Released

Technical overview

WARNING: 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.
17
Identifier GUID-839B4282-96FD-4A76-896D-C515AA711C21
Status Released

Inside view of your computer

Figure 1. Inside view of your computer
1
microphone boards (4) 2 heat sink
3 fan 4 hard drive
5 subwoofer 6 power-button board
7 speakers (2) 8 I/O bracket
9 camera module 10 solid-state drive (M.2)
11 coin-cell battery 12 wireless card
13 side I/O-board 14 media-card reader
15 memory modules (2)
18
Identifier GUID-214C1440-0239-4508-B474-79C9F4F76FCE
Status Released

System-board components

Figure 2. System-board components
1
fan-power cable connector (FAN_SYS)
3 power-button board cable connector
(0SDC1)
5 hard-drive data cable connector
(SATA0)
2 display-cable connector (MB-
DISPC)
4 power-cable connector (MB-
DCPWR)
6 solid-state drive slot (M.2)
19
7 I/O cable connector (RUSBC1) 8 hard-drive power cable connector
9 USB Typec-C cable connector (MB-
TYPEC1)
11 I/O-board cable connector
(LAUOC1)
13 subwoofer cable (WOOFC1) 14 speaker cable (SPEAKER)
15 media-card reader cable connector
(SDRDC1)
17 wireless-card socket 18 camera-cable connector
19 microphones-cable connector
(DMIC1)
21 processor socket
(SATA_PWR1)
10 system board jumper
12 I/O-board power cable (RPWRC1)
16 side I/O-board cable connector
(MB-SUSBC)
(WEBCAM)
20 memory module slots (2)
20
Identifier GUID-AE7F608F-4CAF-464A-B977-4C4D9BB3963A
Status Released

Removing the back cover

WARNING: 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.
Identifier GUID-CF914F47-F704-43B1-B38A-255AED70CF2F
Status Released

Procedure

1 Place the computer on a clean and at surface.
2 Loosen the two captive screws that secure the back cover to the inner frame.
21
3 Slide the back cover towards the top of the computer, and lift the back cover o
the inner frame.
22
Identifier GUID-411D5FFA-086D-432E-9CE3-0ECBF9B7BA71
Status Released

Replacing the back cover

WARNING: 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.
Identifier GUID-A39F4C70-2FEA-4CD3-8A1E-0D1CC3DA91BC
Status Released

Procedure

1 Align the tabs on the back cover with the slots on the inner frame.
2 Slide the back cover towards the bottom of the computer, and snap the back
cover in place.
3 Tighten the captive screws that secure the back cover to the inner frame.
23
Identifier GUID-4BBD3587-8BDA-47F1-ACEB-3CE6AB50FBB3
Status Released

Removing the stand

WARNING: 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.
Identifier GUID-67F8B481-ACBA-47A0-BCAF-357C6042B18E
Status Released

Prerequisites

Remove the back cover.
Identifier GUID-26732E87-B3C1-4440-B848-03635983547B
Status Released

Procedure

1 Remove the six screws (M4x6) that secure the stand to the middle frame.
24
2 Lift the stand o the computer.
25
Identifier GUID-A1A7E0D7-52BF-4F80-84FE-DF5301AE97BA
Status Released

Replacing the stand

WARNING: 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.
Identifier GUID-8E62DBB0-559F-4B2D-858A-F1656232760C
Status Released

Procedure

1 Align the screw holes on the stand with the screw holes on the middle frame.
2 Replace the six screws (M4x6) that secure the stand to the middle frame.
Identifier GUID-6C2AFA20-3736-4FA0-82F0-ADE9E9240AD7
Status Released

Post-requisites

Replace the back cover.
26
Identifier GUID-5DE1E07B-4633-4536-ACBF-4A3067007FE0
Status Released

Removing the hard drive

WARNING: 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.
CAUTION: Hard drives are fragile. Exercise care when handling the hard drive.
CAUTION: To avoid data loss, do not remove the hard drive while the computer is in sleep or on state.
Identifier GUID-67F8B481-ACBA-47A0-BCAF-357C6042B18E
Status Released

Prerequisites

Remove the back cover.
Identifier GUID-39B9E0E8-3EAA-40AA-811F-BEE3309FC821
Status Released

Procedure

1 Remove the screw (M3x5) that secures the hard-drive assembly to the middle
frame.
2 Slide the hard-drive assembly out of the hard-drive slot and lift the hard-drive
assembly o the computer.
27
3 Remove the power and data cable from the routing guides on the middle frame.
4 Disconnect the power and data cable from the hard drive.
5 Remove the three screws (M3x3.5) that secure the hard drive to the hard-drive
bracket.
28
6 Lift the hard drive o the hard-drive bracket.
29
Identifier GUID-8D72BB77-0F8B-428E-A98E-FF7DA2CDA899
Status Released

Replacing the hard drive

WARNING: 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.
CAUTION: Hard drives are fragile. Exercise care when handling the hard drive.
Identifier GUID-2323848B-4918-4784-9E73-6E0DCF805118
Status Released

Procedure

1 Place the hard drive into the hard-drive bracket and align the screw holes on the
hard-drive bracket with the screw holes on the hard drive.
2 Replace the three screws (M3x3.5) that secure the hard drive to the hard-drive
bracket.
3 Connect the power and data cable to the hard drive.
4 Slide the hard-drive assembly into the hard-drive slot on the computer.
5 Replace the screw (M3x5) that secures the hard-drive assembly to the middle
frame.
Identifier GUID-6C2AFA20-3736-4FA0-82F0-ADE9E9240AD7
Status Released

Post-requisites

Replace the back cover.
30
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