Bricked WRT54G V1.0

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rbeims
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Joined: 15 Apr 2009
Posts: 2

PostPosted: Fri Apr 17, 2009 0:47    Post subject: Bricked WRT54G V1.0 Reply with quote
Hello all,
I have a bricked WRT54G V1.0 that I'm trying to fix via JTAG for some time now.
Just as information, when I started this router the first time only the power LED was on and didn't blink at all.
Now I have the Diag LED on also (no blinking).
I tried to flash two different CFE images until now. One was generated by skynet software (I generated the V1.1 version, as was suggested in another thread).
The second image that I tried I got from another thread here (supposedly taken from a working V1.0 device).
Anyway, I soldered the JTAG pins and connected a passive cable to my parallel port.
With this setup I can backup the cfe and erase the flash. When I try to flash something, almost everytime the process hangs at some point (I already got 4%, 5%, 6%, 20%, 40%, 95%). With some tries the process finished, but when I backup the written CFE I noticed that the version in the flash is not the same that I wrote. There are always some random addresses when the bytes get corrupted.
I'm using the tjtag3 tool in linux, and the command line I used was:
Code:
./tjtag3 -flash:cfe /nobreak

Without the /nobreak the software hangs at:
Code:
Halting Processor ...
00000000001000001000000000000100 (00208004)
00000000001000000000000000000100 (00200004)
<Processor Entered Debug Mode!> ... Done

I have tried /noreset /noemw and /nocwd without success.
I also tried to write a CFE with all zeros, and this got corrupted too.
I don't think that there is a problem with my cable or PC, because before I started working with this router I debricked (via JTAG) two WRT54G V6 with this same setup.
Could you give me any hints of what I should try to solve my problem?
Thanks in advance for the help,
Rafael
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Donny
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Joined: 13 Nov 2008
Posts: 5266
Location: CENTRAL Midnowhere

PostPosted: Fri Apr 17, 2009 2:30    Post subject: Reply with quote
Sounds like noise. Shorter cable or remove electrical interference.
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rbeims
DD-WRT Novice


Joined: 15 Apr 2009
Posts: 2

PostPosted: Fri Apr 17, 2009 2:40    Post subject: Reply with quote
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