Installation guide

C-16 Cisco 4000 Series Installation Guide

Replacing Boot ROMs in the Cisco 4000-M

To upgrade the boot read-only memory (ROM) software to a new software image, the

existing boot ROMs must be replaced.

Take the following steps to replace boot ROMs in a Cisco 4000-M.

Step 1 Remove the chassis cover and expose the boot ROMs following the procedures in

the section “Accessing the Internal Components of the Router” in the chapter

“Conﬁguring the Cisco 4000 Series Chassis.”

Step 2 After the boot ROMs labeled FW1 and FW2 on the system card are exposed (see

Figure C-1), follow the procedures in this section to replace the boot ROMs.

Note It is not necessary to remove the Flash EPROM card for this upgrade procedure.

Caution The correct placement of the boot ROMs is crucial. If improperly positioned, the

new components could be damaged when the system is powered on. Read all of the

instructions before proceeding. To prevent damage to the ROMs from ESD (when handling

the system and its components), follow the ESD procedures described earlier. Also, be

careful not to damage or scratch the printed circuit card under the ROMs.

Step 3 Locate the boot ROMs, FW1 and FW2, on the motherboard. (See Figure C-9.)

Step 4 Gently extract the old ROMs with an ROM extraction tool or a small ﬂat-blade

screwdriver, and set the old boot ROMs aside.

Step 5 Insert the new boot ROMs in their respective sockets in the orientation shown in

Figure C-9, being careful not to bend or crush any of the bottom pins. To

straighten out a bent pin, use needlenose pliers. Align the notch in the new ROM

with the notch in the ROM socket, ignoring the orientation of the label.