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Bricked e4200 looking for fix

Discussion in 'Modding Forum' started by morph1976, Apr 7, 2014.

  1. morph1976

    morph1976 Reformed Router Member

    Hi guys I have a cisco E4200 that I had nk60 nvram ddwrt. I tried to install tomato firmware and it's now bricked. I could ping it so I tried to revive it with a seriel cable but now all I get is a solid white light on the front and it isn't pingable. I'm guessing it needs jtagging and the nvram clearing from what I have read but I do not possess the skills to do it. Does anyone in the UK offer a jtagging service and what would the cost be
    Thankyou

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  2. morph1976

    morph1976 Reformed Router Member

    Bump

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  3. morph1976

    morph1976 Reformed Router Member

    Could anyone tell me which jtag cable to use or point me to a link please

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  4. morph1976

    morph1976 Reformed Router Member

    Bump

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  5. morph1976

    morph1976 Reformed Router Member

    Bump

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  6. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Assuming you have tried different ethernet cables in different LAN ports already, please consider the following:

    You may already be aware of this, but there is a very brief window of opportunity where the router may be "pingable" upon reboot/power on. With your PC/laptop on a static ip address of 192.168.1.x wired to a LAN port, power on while pinging 192.168.1.1 (I use Linux, which pings indefinitely. For Windows you may need a command line switch so it doesn't stop after 5 attempts.) If even a single response comes back, then you can flash new firmware with the Linksys tftp utility from Victek's website. If not, then serial cable would usually be sufficient unless there is a problem with CFE. Asking for help on how to unbrick the router using the serial console may be more fruitful than asking for someone to provide a JTAG cable and procedure.

    If the above fails and nobody here or on dd-wrt or OpenWRT forum has done JTAG for an E4200v1 then you are probably out of luck. AFAIK there's no such thing as a JTAG service, only hobbyists who have had to go down that road themselves to unbrick a router.
     
  7. morph1976

    morph1976 Reformed Router Member

    Thanks marcel

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