User guide

Maintaining the Cisco 2500 Series Access Server B-5
Upgrading the Boot PROMs
Tools and Equipment Required for Replacing the Boot PROMs
The following tools and equipment are required to replace the boot PROMs:
• Erasable programmable read-only memory (EPROM) extraction tool or a small
flat-blade screwdriver
• Two boot PROMs
Replacing the Boot PROMs
Take the following steps to replace the boot PROMs:
Step 1 To open the chassis and expose the boot PROMs, follow the procedures in the
section “Opening the Chassis” earlier in this appendix.
Step 2 Locate the boot PROMs FW1 and FW2 (see Figure B-2).
Caution The correct placement of the boot PROMs is crucial. If the PROMs are installed
in the wrong sockets, they could be damaged when the system is powered on. To prevent
damage to the PROMs from ESD (when handling the system and its components), follow
the ESD procedures described in the section “Preventing Electrostatic Discharge Damage”
in the chapter “Preparing to Install the Cisco 2500 Series Access Server.” Also, be careful
not to damage or scratch the printed circuit card under the PROMs.
Step 3 Using an EPROM extraction tool or a small flat-blade screwdriver, gently remove
the boot PROMs (see Figure B-3) and set them aside on a nonconductive surface.