Dell Inspiron 7786 User manual

Inspiron 7786
Service Manual
Regulatory Model: P36E
Regulatory Type: P36E001

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.
© 2018 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.
2018 - 08
Rev. A00

Contents
1 Before working inside your computer............................................................................................................. 8
Before you begin ............................................................................................................................................................... 8
2 After working inside your computer............................................................................................................... 9
3 Safety instructions....................................................................................................................................... 10
Electrostatic discharge—ESD protection......................................................................................................................10
ESD eld service kit ......................................................................................................................................................... 11
Components of an ESD eld service kit................................................................................................................... 11
ESD protection summary ...........................................................................................................................................11
Transporting sensitive components................................................................................................................................12
Lifting equipment .......................................................................................................................................................12
4 Recommended tools.....................................................................................................................................13
5 Screw list..................................................................................................................................................... 14
6 Removing the base cover............................................................................................................................. 15
Procedure.......................................................................................................................................................................... 15
7 Replacing the base cover..............................................................................................................................17
Procedure...........................................................................................................................................................................17
8 Removing the battery...................................................................................................................................19
Prerequisites......................................................................................................................................................................19
Procedure.......................................................................................................................................................................... 19
9 Replacing the battery...................................................................................................................................21
Procedure.......................................................................................................................................................................... 21
Post-requisites..................................................................................................................................................................22
10 Removing the memory modules..................................................................................................................23
Prerequisites..................................................................................................................................................................... 23
Procedure..........................................................................................................................................................................23
11 Replacing the memory modules.................................................................................................................. 24
Procedure..........................................................................................................................................................................24
Post-requisites..................................................................................................................................................................24
12 Removing the coin-cell battery...................................................................................................................25
Prerequisites..................................................................................................................................................................... 25
Procedure..........................................................................................................................................................................25
13 Replacing the coin-cell battery...................................................................................................................26
Contents 3

Procedure..........................................................................................................................................................................26
Post-requisites..................................................................................................................................................................26
14 Removing the fan....................................................................................................................................... 27
Prerequisites..................................................................................................................................................................... 27
Procedure..........................................................................................................................................................................27
15 Replacing the fan....................................................................................................................................... 28
Procedure..........................................................................................................................................................................28
Post-requisites..................................................................................................................................................................28
16 Removing the heat sink.............................................................................................................................. 29
Prerequisites..................................................................................................................................................................... 29
Procedure..........................................................................................................................................................................29
17 Replacing the heat sink.............................................................................................................................. 30
Procedure..........................................................................................................................................................................30
Post-requisites..................................................................................................................................................................30
18 Removing the hard drive............................................................................................................................. 31
Prerequisites...................................................................................................................................................................... 31
Procedure.......................................................................................................................................................................... 31
19 Replacing the hard drive.............................................................................................................................33
Procedure..........................................................................................................................................................................33
Post-requisites..................................................................................................................................................................34
20 Removing the solid-state drive/Intel Optane memory module....................................................................35
Prerequisites..................................................................................................................................................................... 35
Procedure..........................................................................................................................................................................35
21 Replacing the solid-state drive/Intel Optane memory module.....................................................................37
Procedure..........................................................................................................................................................................37
Post-requisites..................................................................................................................................................................38
Procedure to move the screw mount............................................................................................................................38
22 Removing the speakers..............................................................................................................................40
Prerequisites..................................................................................................................................................................... 40
Procedure..........................................................................................................................................................................40
23 Replacing the speakers...............................................................................................................................41
Procedure.......................................................................................................................................................................... 41
Post-requisites.................................................................................................................................................................. 41
24 Removing the wireless card....................................................................................................................... 42
Prerequisites..................................................................................................................................................................... 42
Procedure..........................................................................................................................................................................42
4Contents

25 Replacing the wireless card........................................................................................................................44
Procedure..........................................................................................................................................................................44
Post-requisites..................................................................................................................................................................44
26 Removing the display assembly................................................................................................................. 45
Prerequisites..................................................................................................................................................................... 45
Procedure..........................................................................................................................................................................45
27 Replacing the display assembly..................................................................................................................46
Procedure..........................................................................................................................................................................46
Post-requisites..................................................................................................................................................................46
28 Removing the power-adapter port............................................................................................................. 47
Prerequisites..................................................................................................................................................................... 47
Procedure..........................................................................................................................................................................47
29 Replacing the power-adapter port............................................................................................................. 48
Procedure..........................................................................................................................................................................48
Post-requisites..................................................................................................................................................................48
30 Removing the I/O board............................................................................................................................ 49
Prerequisites..................................................................................................................................................................... 49
Procedure..........................................................................................................................................................................49
31 Replacing the I/O board............................................................................................................................. 50
Procedure......................................................................................................................................................................... 50
Post-requisites................................................................................................................................................................. 50
32 Removing the power button with ngerprint reader................................................................................... 51
Prerequisites......................................................................................................................................................................51
Procedure.......................................................................................................................................................................... 51
33 Replacing the power button with ngerprint reader...................................................................................52
Procedure ........................................................................................................................................................................ 52
Post-requisites..................................................................................................................................................................52
34 Removing the system board.......................................................................................................................53
Prerequisites..................................................................................................................................................................... 53
Procedure..........................................................................................................................................................................53
35 Replacing the system board.......................................................................................................................55
Procedure......................................................................................................................................................................... 55
Post-requisites................................................................................................................................................................. 56
Entering the Service Tag in the BIOS setup program................................................................................................. 56
36 Removing the touchpad............................................................................................................................. 57
Prerequisites..................................................................................................................................................................... 57
Contents 5