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How to resolve console overrun errors
Console overrun errors occur when the router cannot process console inputs properly.
This issue is usually caused by a problem with the terminal emulation software. Try Hyperterminal if you currently use a different emulation program. For information on setting up Hyperterminal, refer to Capturing Text Output from Hyperterminal . If the problem occurs while using Hyperterminal, try a different PC.
If the router does boot after experiencing the problem, there could be a problem with the console port. For modular routers, remove the cards and reload the router. If the router boots without errors, add cards one at a time to discover the faulty module. If this does not solve the problem, replace the chassis.
When hardware replacement is indicated, choose from one of these options:
If you have a hardware support contract directly with Cisco for this part, use the Service Order Submit Tool to request a replacement part directly.
For warranty service, contact the Cisco Technical Assistance Center (TAC) directly at 1-800-553-2447, or online using the TAC Service Request Tool.
If your product is not covered by contract or warranty, contact your Cisco partner or reseller to request a replacement part for the hardware component that is causing the issue.