Results 1 to 4 of 4

Thread: Some questions regarding debricking a 500gx

  1. #1

    Some questions regarding debricking a 500gx

    Hello all,

    I am not sure how, but soon after installing openwrt I managed to brick my new 500gx. Searching the forums seems to suggest that this usually happens when some NVRAM setting gets changed to a value that the bootloader cannot deal with. Since I only used "nvram show," I can only presume that the NVRAM was changed by some other program, possibly the web interface (which I did use to change some settings such as IP address, hostname, etc.).

    Anyways, here are my symptoms, and then I have some questions regarding my recovery options.

    1) SSH, pings, etc no longer work (over wireless or wired)
    2) The Air LED comes on and stays on a few seconds after power-up.
    3) I am able to associate to the wireless connection, and the LAN ports are acting as a switch
    4) Holding down the reset button during power-up (plugging power cable in) no longer activates firmware flashing mode (i.e the power LED does not blink, it just stays on)

    My questions are:
    1) Based on the behavior of the LEDs, is "pmon" functional at all? Any idea what state it might be in?
    2) If I were to connect up a serial port as described here:
    should I be able to get a command prompt for pmon (assuming it were functional)?
    3) If I were able to get a command prompt for pmon, are there any commands that would allow me to reset the NVRAM?

    My other options seem to be grounding an address pin on the flash, which I am loathe to do since that would definitely prevent warranty service...(as a side note, any success stories on getting Asus to fix routers with non-Asus firmwares?)

    Any other suggestions?

    Thanks for your help and for all the good info already on the forum!

  2. #2
    Join Date
    Dec 2003
    Russian Federation
    Quote Originally Posted by fusterjj
    (as a side note, any success stories on getting Asus to fix routers with non-Asus firmwares?)
    If it is still covered by warranty, send it to repair. ASUS guys do not have any tools to check the firmware version, etc. Your unit would be replaced.

    Adding a serial port will void your warranty too, as long as your remove warranty seal on one of the pads, unless you attach a cable by unscrewing two screws only. Getting CFE (not the pmon) prompt could help you to find out the problem.

  3. #3

    Some progress


    Thanks for your help, Oleg. I went ahead and added the serial port. It looks like OpenWrt is actually booting, but the network interfaces are not brought up. Also, the bootloader was giving an "Error" when attempting to do TFTP at the beginning, and was not showing the "Device eth0:" message. I was able to fix this by setting "lan_ipaddr" with "nvram set".

    For some reason linux is only recognizing the wireless network interface, as can be seen in the kernel message output for eth0. I suspect there are more nvram settings that are missing (the list is now very short!). Any ideas which ones could be necessary for the wired ethernet interface to work?


    P.S. I have tried setting wl0_ifname=eth1, but it keeps getting reset to eth0.
    Attached Files Attached Files

  4. #4


    OK, it looks like I got it working. Apparently I needed to set "et0phyaddr=254", and then for OpenWrt's benefit, "boardnum=45"...everything seems OK so far.

Similar Threads

  1. Hardware Version / bootloader questions
    By fibble in forum WL-500g Q&A
    Replies: 2
    Last Post: 29-12-2005, 12:48
  2. 500gx causes system to crash
    By oswald in forum WL-500g Q&A
    Replies: 19
    Last Post: 26-04-2005, 12:48
  3. Questions about BlueTooth and Samba
    By molski in forum WL-500g/WL-500gx Tutorials
    Replies: 13
    Last Post: 10-10-2004, 01:29
  4. Some NOOB questions from a new member
    By molski in forum WL-500g Q&A
    Replies: 2
    Last Post: 01-10-2004, 17:41

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts