Dell Inspiron 16 Plus 7640 - Installing the I;O Board

Steps
1. Remove the two screws (M2.5x5.5) that secure the display-assembly hinge to the palm-rest and keyboard assembly.
2. Pry open the left-display assembly hinge at an angle of 90 degrees.
3. Lift the latch and disconnect the I/O-board cable from its connector (IOBD1) on the I/O board.
4. Lift the latch and disconnect the optional fingerprint cable from its connector (FPR1) on the I/O board.
NOTE: This step is only applicable for computers that are shipped with the power button with an optional fingerprint
reader.
5. Remove the screws (M2x3) that secures the I/O board to the palm-rest and keyboard assembly.
6. Lift the I/O board off the palm-rest and keyboard assembly.
Installing the I/O board
CAUTION: The information in this section is intended for authorized service technicians only.
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the I/O board and provides a visual representation of the installation procedure.
Figure 45. Installing the I/O board
Steps
1. Place the I/O board onto the palm-rest and keyboard assembly .
2. Align the ports on the I/O board to the slots on the palm-rest and keyboard assembly.
3. Align the screw holes on the I/O board to the screw holes on the palm-rest and keyboard assembly.
4. Replace the screws (M2x3) that secures the I/O board to the palm-rest and keyboard assembly.
5. Connect the I/O-board cable to its connector (IOBD1) on the I/O board and close the latch.
6. Connect the optional fingerprint cable to its connector (FPR1) on the I/O board and close the latch.
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Removing and installing Field Replaceable Units (FRUs)