try to reboot the switch with the laptop consoled in, and check if there are any POST failures. Possibly you are experiencing a hardware failure. How old are the switches ?
Thanks for your reply.
I've tried rebooting with a laptop consoled in and all I get is either a tilde (~) or a capital c (C) show on the console.
The switch shows ports 3, 7, and 11 in amber and the RPS is amber also, but I don't have it connected to any external RPS.
These are 5 years old.
Thanks for any help.
Can you confirm that your terminal emulation program is configured for 9600-8-N-1 ? If it is, try and configure it for the next higher speed (19200) and then try again. Repeat the process till you get to a baud rate of 115200. Maybe the console has been configured for a non-9600 baud rate...
Two of the ports connected to a PC and one had nothing connected. I've disconnected everything and no luck.
What I mean is that I have several 3512 switches (6) and I've had three just stop working and not responding. One I was able to console into, but I couldn't reload the IOS. This one doesn't respond at all except sometimes when I plug it back in I get a tilde(~) or a C.
Are these switches that you've set up? I mean, could someone have changed the con settings?
You can always break the process by holding down the mode button while powering it up.
Yes they are ones I set up. I tried a console connection all different ways and no luck. I also have tried holding down the mode button and nothing. I think it is dead.