Log in to Cisco switch, copyflash:tftp:, then write down the IP and IOS names of tftp server as required, and then dump them. Locate the file in the appropriate folder on your computer.
You log on to the switch remotely, and then zoom out directly to see the running configuration. Besides, your title and content are far from perfect.
It should be that the system image of the switch (just like the operating system of the computer) is gone, (it may be deleted by mistake, or the flash may be broken). You can use the dir command to see if there are any other files. You can download the image file and send it to HyperTerminal.