Replacing the CPU module

About replacing the CPU module

Replacing the CPU module consists of the following procedures:

Removing the CPU module
Installing the CPU module

Location of the CPU module and blank filler module

The CPU module is at the center-bottom position on the back of your appliance. A blank filler module is directly above it. Both modules use the same cam mechanism levers to remove and install the module.

Caution
Both modules must be in place during operation to ensure proper airflow through the appliance.

CPU module contents

The CPU module contains the system motherboard, CPU, memory DIMM, CompactFlash^TM card, battery pack, and other system components.

Reasons for removing the CPU module

There are several reasons for removing the CPU:

Replacement of a defective CPU module
Replacement of the SDRAM DIMM
Accessing the CompactFlash card
Accessing the system battery and connection to the motherboard
Appliance upgrade and conversion options

Removing the CPU module

To remove the CPU module, complete the following steps.

Step	Actions
1	Shut down the appliance by entering the following command at the console: halt Caution Always use the `halt` command to perform a clean shutdown.
2	Turn off and disconnect the power to the appliance.
3	Disconnect all cables to the CPU module.
4	Put on the antistatic wrist strap and attach the grounding leash to the appliance chassis.
5	At the rear-center of your appliance, using your thumb and index finger of both hands, press the cam mechanism levers in the middle of the CPU module to release it. The following figure shows how to release the cam mechanism.
6	Carefully pull the cam handle so that the CPU module slides out from the chassis. The CPU module has a travel distance of approximately 10 inches (25.4 centimeters).

Installing the CPU module

To install the CPU module in your appliance, complete the following steps.

Caution
Do not use excessive force when sliding the CPU module into the chassis. You can damage the connector.

Step	Action
1	Put on the antistatic wrist strap and grounding leash.
2	At the back of your appliance, with the CPU module motherboard and components facing up, slide the module into the CPU module bay and push the cam mechanism levers into place.
3	Connect all cables to the CPU module. See Connecting the appliance to a network.
4	Reconnect the power to your appliance and turn on the power switch on both power supplies. See Connecting the appliance to a power source.
5	After turning on your system, run diagnostics. See the Diagnostics Guide for more information.
6	If you installed a new CPU module with a new CompactFlash card, the card might not contain any data, in which case you need to boot your appliance from a remote image. This process is called netbooting. See Netbooting an FAS250.