help on 2500 boot prompt

Hello, I have a 2500 router that always starts with this prompt: routername(boot)> altough the register configuration setting is 0x2102. I noticed that the ios image on flash has an invalid checksum, so I tried to get a "new" one via tftp, but once the download has completed, it calculates the new checksum and it is invalid again! Supposing it's a memory issue, I tried replacing the flash memory with another from an identical router with the same ios image: this time the checksum is valid but the prompt is still the same!!

Could you help or show the right way to solve this problem? Thanks in advance.

Bye.

You may wish to investigate the online Cisco Router TAC Case / Knowledge Base:

http://129.41.16.73/core/home Hope this helps,

Brad Reese Free Cisco Security Upgrades:

BradReese.Com Cisco Repair Service Experts Hendersonville Road, Suite 17 Asheville, North Carolina USA 28803 U.S./Canada Toll Free: 877-549-2680 International: 828-277-7272 United Kingdom: 44-20-70784294