Are you sure that there is no image in the flash. As you said you tried upgrading and something went wrong.
If there is no image at all in flash then we can go for xmodem but incase there is any image in router flash we can manually boot the router from the flahs with that image and once the router is up we can se the boot path and the ocnfig register vlaue to 2102.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...