I have recieved about 30 Cisco 3745 Routers. I have loaded the 188.8.131.52T Enterprise Plus BIN image on them. Most of them work, but there are a few where the engine boards are bad and some where they work but I am getting amd_flash_cmd errors. I have swapped out the flash memeory and NVRAM. In conjunction with this error I also revieve bad checksum errors whcih is why I swapped out the NVRAM. I am also using the BIN image that I loaded on other 3745s that work without a hitch. I also verified that the flash cards and NVRAM work in the other routers with the same config. Cisco doesnt know what it is. I think its a bad engine board. If you have any other suggestions, please tell me.