12. Close the controller module cover.
Step 4: Reinstall the controller module
After you replace components in the controller module, you must reinstall it into the
chassis.
1. If you have not already done so, replace the cover on the controller module.
2. Align the end of the controller module with the opening in the chassis, and then gently push the controller
module halfway into the system.
Do not completely insert the controller module in the chassis until instructed to do so.
3. Recable the system, as needed.
If you removed the media converters (QSFPs or SFPs), remember to reinstall them if you are using fiber
optic cables.
4. Complete the reinstallation of the controller module. The controller module begins to boot as soon as it is
fully seated in the chassis. Be prepared to interrupt the boot process.
a. With the cam handle in the open position, firmly push the controller module in until it meets the
midplane and is fully seated, and then close the cam handle to the locked position.
Do not use excessive force when sliding the controller module into the chassis to avoid
damaging the connectors.
The controller begins to boot as soon as it is seated in the chassis.
b. If you have not already done so, reinstall the cable management device.
c. Bind the cables to the cable management device with the hook and loop strap.
d.
When you see the message
Press Ctrl-C for Boot Menu, press Ctrl-C to interrupt the boot
process.
If you miss the prompt and the controller module boots to ONTAP, enter halt, and then
at the LOADER prompt enter
boot_ontap, press Ctrl-C when prompted, and then
boot to Maintenance mode.
e. Select the option to boot to Maintenance mode from the displayed menu.
Step 5: Run system-level diagnostics
After installing a new DIMM, you should run diagnostics.
Your system must be at the LOADER prompt to start System Level Diagnostics.
All commands in the diagnostic procedures are issued from the node where the component is being replaced.
1. If the node to be serviced is not at the LOADER prompt, perform the following steps:
a. Select the Maintenance mode option from the displayed menu.
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