Dell Precision 7550 Service Manual page 5

Installing the system board...........................................................................................................................................64
GPU card.............................................................................................................................................................................. 67
Removing the GPU card............................................................................................................................................... 67
Installing the GPU card................................................................................................................................................. 68
Speaker.................................................................................................................................................................................68
Removing the speaker.................................................................................................................................................. 68
Installing the speaker.....................................................................................................................................................69
Middle cap............................................................................................................................................................................. 71
Removing the middle cap.............................................................................................................................................. 71
Installing the middle cap................................................................................................................................................72
Display assembly.................................................................................................................................................................. 73
Removing the display assembly................................................................................................................................... 73
Installing the display assembly......................................................................................................................................75
Palm rest...............................................................................................................................................................................78
Removing the palmrest................................................................................................................................................. 78
Installing the palmrest................................................................................................................................................... 79
Display bezel.........................................................................................................................................................................80
Removing the display bezel (non-touch)................................................................................................................... 80
Installing the display bezel (non-touch).......................................................................................................................81
Display panel.........................................................................................................................................................................83
Removing the display panel (non-touch)................................................................................................................... 83
Installing the display panel (non-touch)......................................................................................................................85
Display hinges.......................................................................................................................................................................86
Removing the display hinge..........................................................................................................................................86
Installing the display hinge (non-touch)......................................................................................................................87
Camera..................................................................................................................................................................................89
Removing the camera (non-touch)............................................................................................................................ 89
Installing the camera..................................................................................................................................................... 90
P-sensor board..................................................................................................................................................................... 91
Removing the P-sensor board......................................................................................................................................91
Installing the P-sensor board........................................................................................................................................92
Display cable.........................................................................................................................................................................92
Removing the display cable.......................................................................................................................................... 92
Installing the display cable............................................................................................................................................ 94
Display back cover...............................................................................................................................................................95
Replacing the display cable.......................................................................................................................................... 95
4 Troubleshooting......................................................................................................................... 97
Dell SupportAssist Pre-boot System Performance Check diagnostics........................................................................97
Running the SupportAssist Pre-Boot System Performance Check....................................................................... 97
System board built-in self-test (M-BIST)........................................................................................................................ 98
Display panel power rail built-in self-test (L-BIST)......................................................................................................... 98
Display panel built-in self-test (LCD-BIST)......................................................................................................................99
System diagnostic lights.....................................................................................................................................................99
WiFi power cycle................................................................................................................................................................100
5 Getting help............................................................................................................................. 102
Contacting Dell................................................................................................................................................................... 102
Contents 5