Dell Latitude 7400 2-in-1 Service Manual - Page 73

upward motion to prevent damage to the connector's pins.

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Steps 1. Disconnect the coin cell cable from the system board [1] and remove the coin cell from the system board [2]. After removing all brackets and disconnecting all cables, there are five screws that secure the system board to the palmrest. One of the screw is covered by the Real Time Clock (RTC) battery. Technicians must first peel the RTC battery off the system board in order to access all the screws for the system board. 2. Peel off the tape on the display cable connector of the system board [3]. 3. Pry the retention clips on both sides of the display cable connector, to flip open the latch [4]. 4. CAUTION: The connector for the display cable features an actuator that locks it in place on the system board. Flip open the latch to disconnect the display cable from the system board. Grasp the left and right sides of the cable's connector head and disconnect the display cable from the system board in a direct upward motion to prevent damage to the connector's pins. Disconnect the display cable from the system board [5]. 5. Disconnect the following power button cable from the system board [1]. 6. Disconnect the USH board cable [2] and keyboard with backlight cable [3] from the system board. 7. Disconnect the touchpad cable [4] and LED board cable [5] from the system board. Removing and installing components 73

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Steps
1.
Disconnect the coin cell cable from the system board [1] and remove the coin cell from the system board [2].
After removing all brackets and disconnecting all cables, there are five screws that secure the system board to the palmrest.
One of the screw is covered by the Real Time Clock (RTC) battery. Technicians must first peel the RTC battery off the
system board in order to access all the screws for the system board.
2.
Peel off the tape on the display cable connector of the system board [3].
3.
Pry the retention clips on both sides of the display cable connector, to flip open the latch [4].
4.
CAUTION:
The connector for the display cable features an actuator that locks it in place on the system
board. Flip open the latch to disconnect the display cable from the system board. Grasp the left and right
sides of the cable's connector head and disconnect the display cable from the system board in a direct
upward motion to prevent damage to the connector's pins.
Disconnect the display cable from the system board [5].
5.
Disconnect the following power button cable from the system board [1].
6.
Disconnect the USH board cable [2] and keyboard with backlight cable [3] from the system board.
7.
Disconnect the touchpad cable [4] and LED board cable [5] from the system board.
Removing and installing components
73