comment recuperer un routeur apres un flashage rate?

Q : How should I do if I lost firmware and can`t enter debug mode?
 
A : When your Prestige lost firmware and can`t boot up properly, you should enter
debug mode to upload firmware by `atur` command. But in some worst case, you
can`t enter debug mode to recover this problem. The solution is as below :
 
1. When you can`t see DRAM selftest.
a) Open any terminal software and setup proper baud rate and com port
b) Power on Prestige
c) After Prestige power on, press `z` key immediately. You will see firmware  
   upload screen, Prestige is waiting for firmware upload via serial port Xmodem  
   protocol.
 
2. When you can see DRAM selftest, but after DRAM selftest, you got garbage  
   symbol.
a) Open any terminal software and setup proper baud rate and com port
b) Power on Prestige
c) When P1600 check the 2nd bank of SDRAM and near the ending, press "z"    
   immediately and continuously. Please remember your action must be very fast  
   and you will see firmware upload screen.
d) After Prestige power on, press `z` key immediately. You will see Prestige is  
    waiting for firmware upload via serial port XMODEM