Press the reset button, for at least 30 seconds, to restore to factory, defaults.(with modem connected to power/computer). See any activity in modem lights.
Clear all temp files in IE ( tools/IEoptions/privacy)
log in 192.168.1.1 id admin password admin.
Para two :.Please give details of device status.
( board ID Fw version etc )
Only after opening modem pages you can get this information., to confirm FW has been done successfully.