I had a flashcard in my 2801 go corrupt. TAC sent me a new one.
I need to get a bootable image on this %$*@ card!! Xmodem, tftpdnld, nothing has worked. I am told it is uber-easy to do with a working 2801, so OK, tell me how that works!
I have a working 2801 in another building. Do I shut it off, pull the flash, put mine in, and boot up? Doesn't make sense. But I'm willing to try anything....
But you should be able to boot with it in the existing router, and it should ask you to do a basic config. Once you config it, you should be able to tftp etc with no issues.