The notches on the floor of the chassis hold the midplane board in place.4. Using the Torx 15 screwdriver, replace the 11 screws to secure the midplane board on the chassis.5. Connect the front LED status module cable to the midplane board.6. Install the following:– power transmission board assemblies– cooling fans– power supply units7. Install the NAS appliance in the rack.8. Install the controllers in the NAS appliance.CAUTION: Label all the cables correctly before disconnecting any cables. Ensure that the cables are reconnectedto the same ports when installing the controller.9. Reconnect all the cables to the back of the NAS appliance.10. Close the NAS appliance.11. Connect the power cable(s) to the power supply units and plug the power cable(s) into a power outlet.NOTE: Contact technical support to program the chassis service tag in the midplane board.Opening And Closing The ControllerOpening The ControllerCAUTION: Many repairs may only be done by a certified service technician. You should only performtroubleshooting and simple repairs as authorized in your product documentation, or as directed by the online ortelephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by yourwarranty. Read and follow the safety instructions that came with the product.NOTE: This is a service only procedure.1. Remove the controller from the NAS appliance.2. Press the release button and slide the cover toward the front of the controller.3. Lift the cover away from the controller.31