1. Disconnect Power cable
   
2. Connect the USB to serial cable
   
3. Open Putty or similar terminal emulator and config it (9600, 8, N, 1)
   
4. While reconnecting it press and hold the MODE button for 15 seconds
   
5. release the button and you will see the SYS led going SOLID GREEN and the prompt "switch :" will appear
   
6. run the following commands
   
7. flash_init
   
8. dir flash:
   
9. delete flash:vlan.dat
   
10. delete flash:config.text
    
11. delete flash:config.text.backup
    
12. boot
    
13. wait for the switch to load the boot image and wait for it to ask for initial settings
    
14. now we need to check the stack config and eventually reset the stack membership config
    
15. answer "no" to the first question
    
16. enter the enable contest
    
17. run the sh switch command to check the number of the stack is assigned
    
18. run conf t
    
19. run switch <number of the switch returned by the previous command> renumber 1
    
20.  run end
    
21. run wr me
    
22. run reload
    
23. after the reboot check in the config if there are other switches configured as slave
    
24. run sh run
    
25. if you see this line in the config
    
1. switch 1 provision ws-c3750g-48ps
   
2. switch 2 provision ws-c3750g-48ps
   
26. You need to run the following
    
27. run conf t
    
28. run no switch 2 provision ws-c3750g-48ps
    
29. run end
    
30. run wr mem
    
31. Now the switch is completely reset to its factory default