Dell OptiPlex 7090 Small Form Factor Service Manual - Page 59

Installing the system board

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Steps 1. Remove the screw (6-32) that secures the front I/O bracket to the chassis. 2. Lift the front I/O panel away from the chassis. 3. Unroute the SATA cables from the cable routing guide on the metal bracket. 4. Remove the two (6-32) screws from the metal bracket from over the M.2 SSD slot and lift it away from the system. 5. Disconnect the following cables from their connectors on the system board: ● Intrusion switch ● ATX system board power supply cables ● Power button switch ● ATX CPU power supply cable ● SATA data cables ● SATA power cable ● Fan cable 6. Remove the four screws (6-32) and the single standoff screw (M2x4) which secure the system board to the chassis. 7. Free the system board from the back I/O panel by sliding it towards the right and lift the system board out of the chassis. Installing the system board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the system board and provides a visual representation of the installation procedure. Removing and installing components 59

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Steps
1.
Remove the screw (6-32) that secures the front I/O bracket to the chassis.
2.
Lift the front I/O panel away from the chassis.
3.
Unroute the SATA cables from the cable routing guide on the metal bracket.
4.
Remove the two (6-32) screws from the metal bracket from over the M.2 SSD slot and lift it away from the system.
5.
Disconnect the following cables from their connectors on the system board:
●
Intrusion switch
●
ATX system board power supply cables
●
Power button switch
●
ATX CPU power supply cable
●
SATA data cables
●
SATA power cable
●
Fan cable
6.
Remove the four screws (6-32) and the single standoff screw (M2x4) which secure the system board to the chassis.
7.
Free the system board from the back I/O panel by sliding it towards the right and lift the system board out of the chassis.
Installing the system board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the system board and provides a visual representation of the installation procedure.
Removing and installing components
59