Thanks a lot.I tried to use your proposition about reducing the console connection speed to 300, carefully going ahead step by step, but to no avail, unfortunately. Perhaps it does not work for any router model of Cisco?C.  

I had the same issue with some used 1941 Series router I bought on Ebay -- I was able to enter the reset mode by connecting the console to a minicom terminal in Linux and hitting CTRL-A f  (the Break key sequence in Minicom) multiple times right from...