Dell Latitude 5550 Owners Manual - Page 100

Power button with optional fingerprint reader

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Figure 62. Installing the power button Steps 1. Align and place the power button on the palm-rest assembly. 2. Replace the two (M2x2.5) screws to secure the power button to the palm-rest assembly. Next steps 1. Install the system board. NOTE: The system board can be removed and installed with the heat sink attached in order to simplify the procedure and preserve the thermal bond between the system board and heat sink. 2. Install the assembly-inner frame. 3. Install the battery. 4. Install the M.2 2230 SSD in slot 2, if applicable. 5. Install the M.2 2230 or M.2 2280 SSD in slot 1, as applicable. 6. Install the memory modules. 7. Install the wireless card. 8. Install the 4G WWAN card or 5G WWAN card, as applicable. 9. Install the base cover. 10. Install the SIM card. 11. Follow the procedure in After working inside your computer. Power button with optional fingerprint reader Removing the power button with an optional fingerprint reader CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the SIM card. 100 Removing and installing Field Replaceable Units (FRUs)

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Figure 62. Installing the power button
Steps
1.
Align and place the power button on the palm-rest assembly.
2.
Replace the two (M2x2.5) screws to secure the power button to the palm-rest assembly.
Next steps
1.
Install the
system board
.
NOTE:
The system board can be removed and installed with the heat sink attached in order to simplify the procedure
and preserve the thermal bond between the system board and heat sink.
2.
Install the
assembly-inner frame
.
3.
Install the
battery
.
4.
Install the
M.2 2230
SSD in slot 2, if applicable.
5.
Install the
M.2 2230
or
M.2 2280
SSD in slot 1, as applicable.
6.
Install the
memory modules
.
7.
Install the
wireless card
.
8.
Install the
4G WWAN card
or
5G WWAN card
, as applicable.
9.
Install the
base cover
.
10.
Install the
SIM card
.
11.
Follow the procedure in
After working inside your computer
.
Power button with optional fingerprint reader
Removing the power button with an optional fingerprint reader
CAUTION:
The information in this removal section is intended for authorized service technicians only.
Prerequisites
1.
Follow the procedure in
Before working inside your computer
.
2.
Remove the
SIM card
.
100
Removing and installing Field Replaceable Units (FRUs)