Hello Ermias,   Try different baud rates. You might step it down from highest to lowest.   Similar issue on this thread on Cisco site : [URL] Please try to test these speeds: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200. Other speed values are invalid. Every time you change the speed, hit a few times to see if the switch' response becomes intelligible.
I'm connected to the switch with the console cable and what I see are random letters and lines.  It looks like the CLI is corrupted.  I push the reset button several times and it didn't work. Can you please help me reset the switch to the factory setting? Thank You,
DELLEMC N3024ET-ON CLI is not readable!