Unbrick my WRT54GL

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Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Sun Jul 27, 2008 19:44    Post subject: Unbrick my WRT54GL Reply with quote
My router(WRT54GL v1.1 v24 final) is acting up again. It was working fine before, and a few months it started not booting up. The power LED will flash forever, and 4 LAN LEDs and INTERNET LED will be solid on.
So I left it alone and a few months later I turned it on and it booted up normally. I switched it off and it will brick again not booting up. So far I rebooted about a million times trying hard reset, managememnt mode etc nothing works.

So now I really wanna make it work forever so I wanna fix this shit. Now I got a USB JTAG and using the app it detects this:

IDCODE 535217F
Broadcom BCM5352
IMPCODE 800904
DMA Supported

Now WTF should I do to make the router boot up everytime??

NO its not pingable, not TFTPable, nothing worked except the USB JTAG.

Any help on this is appreciated.
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Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Sun Jul 27, 2008 23:31    Post subject: Reply with quote
Any suggestions?

Should I delete the flash or CFE or...?
Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Mon Jul 28, 2008 3:17    Post subject: Reply with quote
Anybody?
punker_4_real
DD-WRT User


Joined: 22 Oct 2006
Posts: 243

PostPosted: Mon Jul 28, 2008 4:15    Post subject: Reply with quote
Victor wrote:
Anybody?


delete the kernal

and nvram


then you can TFTP Smile
Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Mon Jul 28, 2008 4:26    Post subject: Reply with quote
By kernel you mean DD-WRT firmware right?
soulstace
DD-WRT Guru


Joined: 04 Aug 2007
Posts: 6427

PostPosted: Mon Jul 28, 2008 4:28    Post subject: Reply with quote
yes, kernel is part of the firmware. But so is CFE. Do NOT erase the CFE. That is the last resort! (you must then have valid backup to replace it with)

Just use tjtag to erase nvram and kernel portions of flash, then TFTP might work to put dd-wrt back on.
Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Mon Jul 28, 2008 4:50    Post subject: Reply with quote
Will tjtag work with a USBJTAG?
soulstace
DD-WRT Guru


Joined: 04 Aug 2007
Posts: 6427

PostPosted: Mon Jul 28, 2008 4:53    Post subject: Reply with quote
Sorry, can't help ya there. Embarassed I've never tried it over USB myself.
Victor
DD-WRT User


Joined: 21 Nov 2006
Posts: 251

PostPosted: Mon Jul 28, 2008 5:05    Post subject: Reply with quote
ok I will try to find and buy one.

Anyway lets pretend I do have a jtag, what are the exact commands to issue to fix the router?
Thx
soulstace
DD-WRT Guru


Joined: 04 Aug 2007
Posts: 6427

PostPosted: Mon Jul 28, 2008 5:12    Post subject: Reply with quote
The software has docs and help included with it.

tjtag -erase:nvram
tjtag -erase:kernel

Then give your PC a static ip 192.168.1.20 and try TFTP the firmware to the router.
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