I tried to connect to my HP V1910 Switch; I tried with a console cable and putty but I get only a black screen and can't do anything. I also tried to use the default ip address printed on the switch, using putty(both telnet and ssh), but always get the following black screen and can't do anything about it.
putty After ping failed, I checked with nmap -Pn to check if the switch is visible to the network and it's up: