ADSL2MUE not resetting

Discussion in 'Other Linksys Equipment' started by kouye, Sep 3, 2007.

  1. kouye

    kouye LI Guru Member

    I have been given an ADSL2MUE modem that behaves unusually. When powered on, the 'Power' LED lights up red and stays that way. The 'Ethernet' LED lights up a few sconds then turns off, event though a computer is plugged in. I cannot log into the modem's interface using and my computer doesn't get an IP address.
    I tried logging in manually with, and as a default gateway, with no success.
    Holding a pin in the reset hole for over 10 seconds does not seem to restore the unit to factory defaults.
    Any idea how I can get the modem back on its tracks ?
    Thanks in advance.
  2. mstombs

    mstombs Network Guru Member

    The fact that the lights change suggests that the bootloader is intact, the modem is crashing when trying to load firmware and stuck in a reboot loop. Do you know any history of the modem? If a failed/incorrect firmware upgrade then its relatively easy to fix by ftp upload of new firmware to the bootloader. I had one in in a similar state though that behaved like this due to a hardware fault (The internal 3.3V regulator just needed to be replaced).

    To see what is happening you really need to hook up a 3.3V serial console cable (made from max232 or mobile phone adaptor) the connector for the serial console is usually provided on the board inside these modems - this connector also gives you easy access to the 3.3V to monitor it during the boot.

    If the bootloader is corrupt (unlikely) then the only way to recover it is via JTAG.

    You can read all about my adventures into serial console and JTAG on an ADSL2MUE in this thread

    but very unlikely you will need JTAG, maybe just the TI PC-TOOL will do the job (look for the debricking guide on that site), this provides a windows front end to connect to the device bootloader over Ethernet.
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