Replacing the motherboard

Open the PCB carrier by following Steps 2 through 7 of the procedure described in Opening the PCB carrier.

Note
If any motherboard failure occurs, your C3100/C6100 performs a "dirty shutdown," which makes it impossible for you to perform the clean shutdown recommended in step 1. However, your data from the last transaction is still buffered in the battery-backed memory on the NVRAM III adapter.

Remove the PCB carrier by following Steps 2 through 4 of the procedure described in Removing the PCB carrier.

Using the #0 or #1 Phillips screwdriver, remove all adapters except the NVRAM III adapter from the expansion slots on the motherboard by following Steps 2 through 6 of the procedure described in Removing an existing expansion adapter.

Set the screws and adapters aside for later use.

Using a #0 or #1 Phillips screwdriver, remove the screws securing the NVRAM III adapter to the PCB carrier.

Set the screws aside for later use.

Lift the NVRAM III adapter out of the expansion slot and carefully lay it over the side of your C3100/C6100.

This allows easy access for the removal of the NVRAM III battery.

Caution
If a dirty shutdown occurred, do not disconnect the NVRAM III battery wire from the NVRAM III adapter. This disconnection causes data loss.

Using a #0 or #1 Phillips screwdriver, loosen the two thumbscrews securing the NVRAM III battery carrier to the C3100/C6100 chassis.

Lift the NVRAM III battery out of the PCB carrier and place the battery and the still-connected NVRAM III adapter on the nonconductive surface.

If the replacement motherboard does not already have SDRAM DIMMs installed, remove all of them by following Steps 2 through 5 of the procedure described in Removing an SDRAM DIMM.

Set the DIMMs aside for later use.

Using a 3/16-inch socket wrench, remove the four screws on the back of the chassis that secure the Console and Diagnostic ports to the chassis.

Using a #2 Phillips screwdriver, remove the 11 screws securing the motherboard to the PCB carrier.

Lift the motherboard and slide it out of the PCB carrier.

Slide the replacement motherboard into the PCB carrier and, using a #2 Phillips screwdriver, secure the motherboard to the PCB carrier with the 11 screws.

If the replacement motherboard does not already have SDRAM DIMMs installed, reinstall all SDRAM DIMMs as follows:

1. Locate the DIMM slot for the DIMM you are installing.
2. Hold the DIMM by its top corners to avoid damaging the components.
3. Insert the DIMM straight into the slot. The DIMM fits tightly in the slot, but should go in easily. If not, realign the DIMM with the slot and try again.

   Caution
   Visually inspect the DIMM to verify that it is evenly aligned and fully inserted into the slot; otherwise, the edge connector on the DIMM does not make complete contact with the slot.

4. Push carefully, but firmly on the top edge of the DIMM until the latches snap into place.

Without disconnecting the wire from the NVRAM III adapter, reinstall the NVRAM III battery into its place on the PCB carrier.

Note
Maintaining the connection between the NVRAM III adapter and the NVRAM III battery is necessary only if a dirty shutdown occurred.

Tighten the two thumbscrews securing the NVRAM III battery carrier to the PCB carrier.

Carefully turn over the still-connected NVRAM III adapter that is outside of the C3100/C6100 and reinstall it in the expansion slot.

Using the #0 or #1 Phillips screwdriver, secure the NVRAM III adapter to the PCB carrier.

Reinstall all other adapters into the expansion slots on the motherboard by following Steps 3 through 6 of the procedure described in Installing an expansion adapter.

Using a 3/16 inch socket wrench, connect all the screwlocks to the PCB carrier.

Paste the MAC (Media Access Control) address label provided with the replacement motherboard on the PCB carrier, as shown. The following illustration is of a C6100.

Go to Closing the PCB carrier.