Have a belkin share n300 and I too did an improper flash, mine is a bit worse.
Like a dummy, I didn't fully read the instructions and flashed the "dd-wrt.v24-18946_NEWD-2_K2.6_mini_f7d3301.bin"
file as though it was factory firmware through the belkin interface.
The router powers on, led is on, but no connection.
Am I screwed?
Thanks
HOLY DOG CRAP!!!
I just realized I was still on the 192.168.2.8 static IP, I switched to 192.168.1.8 static and when I went to 192.168.1.1 up pops DDWRT
Posted: Mon Aug 12, 2013 7:47 Post subject: Need to debrick Belkin f7d7301
I bricked my Belkin f7d7301 router somehow while flashing tomato from DDWRT . Have tried everything countless 30/30/30 reset's, static IPs (in 192.168.2.8 and 192.168.1.8 ), DHCP, everything but it just turn on. Even on pinging it, all requests time out and neither the cable status (which is unplugged) ever changes. Its dead as brick.
I think its the same issue with the_bhagwan has posted which I need to debrick using JTAG.
However, I don't have right components lying around with me (resistances, d25 cable, etc however I do have a parallel port in one of my computer). Anyway so, I was searching for a ready made JTAG cable, I came across:
Can this be used for the same purpose ? Do I need to buy something else also ? (except for tjtag software)
If the above is not suitable, are there any ready made arrangement available ? Also is there any need for soldering on the board ? I believe Belkin router already has JTAG connectors, just need mating cable only..see pics..
I think that ebay one will work but not sure. There is a 14 pin connector on board like the 14 pin on ebay Jtag. Don't remember which end is which so you may need an ohm meter to find the grounds pins side, pins 2,4,6,8,10. Need Tornado's software to run on 32 bit computer. Tornado asks $5 donation I believe for his software. Try erase NVram first. Otherwise I read it will take a very long time to flash a new kernel.
Here is another one I found, it's 12 pin, just don't connect pins 13 and 14 and it should work.
http://www.ebay.com/itm/JTAG-Cable-Linksys-WRT54G-WRT54GS-WRT54GL-Brick-Repair-/231030195094?pt=LH_DefaultDomain_0&hash=item35ca790396#ht_6152wt_1399
Been a long time since I did this so memory a bit fuzzy on details. Sorry that's about all the info I can think of. Re-read my post on page 1.
I think that ebay one will work but not sure. There is a 14 pin connector on board like the 14 pin on ebay Jtag. Don't remember which end is which so you may need an ohm meter to find the grounds pins side, pins 2,4,6,8,10. Need Tornado's software to run on 32 bit computer. Tornado asks $5 donation I believe for his software. Try erase NVram first. Otherwise I read it will take a very long time to flash a new kernel.
Here is another one I found, it's 12 pin, just don't connect pins 13 and 14 and it should work.
http://www.ebay.com/itm/JTAG-Cable-Linksys-WRT54G-WRT54GS-WRT54GL-Brick-Repair-/231030195094?pt=LH_DefaultDomain_0&hash=item35ca790396#ht_6152wt_1399
Been a long time since I did this so memory a bit fuzzy on details. Sorry that's about all the info I can think of. Re-read my post on page 1.
Thanks a lot for your help, I'll get this one. I was also having doubts about the earlier one I posted as I found out that MSP430 don't have ground pins as 2,4,6,8,10.
One more question though I don't have ohm meter with me either
In the picture you have posted earlier I see there is a serial port. Can it be used to find orientation, as I can deduce pins near the serial interface would be 1 and 2 ?
Or was it just a sample pic layout not for actual router ?
Yes I think I drew it that way to document proper orientation but I honestly don’t remember 100%. If it's hooked up backwards will anything bad happen? Not sure. You may want to get a cheap ohm or continuity tester. On circuit board go from any metal shield to pins 2 4 6 8 10 and there will be continuity. Then you'll know orientation Edit: see next post
But here is something else to think about too. Will your new Jtag cable have marked pin numbers? dont know. A paper clip and and ohm meter would tell you
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Last edited by the_bhagwan on Wed Aug 14, 2013 0:17; edited 1 time in total
Posted: Wed Aug 14, 2013 7:23 Post subject: wow thanks
The cable I ordered (same one as you had given link for) mentions there is a step by step guide included, lets see if there is a way to identify the pin numbers otherwise I can just verify the continuity to find pin numbers.
I'll update my results when I get the cable,I guess in in 2-3 weeks
And thanks a lot, I really appreciate the effort you have put in for me .
If any mods/senior members are reading the thread, please put this information in DDWRT wiki for this router. It would be immensely useful for anyone trying to debrick this router.
I got the cable today. I was successfully able to establish a JTAG connection from my router to PC however, when I do tjtag -probeonly, Broadcomm CPU gets detected however it says unknown or no flash chip detected
Anyway I see that you had specified fc:43 i.e. MX29LV640B 4Mx16 TopB in tjtag, my question how can I confirm the same, that my router also has this same flash chip ?
I had tried tjtag -erase:nvram /fc:43 but it got stuck on erasing first sector itself for a very long time (more than 20 mins) so I had Crtl+C the process ?
BTW which version of tjtag you had used as mine doesn't recognize /cable:DLC5 /byte_mod switches ?
Don’t remember flash chip #
Would have to dissemble it again to see
Also last I remember 3.0.2 had to run on a 32 bit OS.
New for V3.0.2
Support for BCM4716, BCM4717, BCM4718 - Thanks Lom
It is now nessesary to use one of the 2 switches:
/cable:dlc5 - Standard jtag pinout, see docs folder for pinouts
/cable:wiggler - wiggler
Asus RT-N16 = Parallel Flash = Macronix MX29GL256E
Linksys WRT150N v1.0 = Parallel Flash = EON EN29LV320
Linksys WRT150N v1.1 = Parallel Flash = Samsung K8D3216UBC
Linksys WRT160N v1.0 = Parallel Flash = EON EN29LV320AB-70TCP
Linksys WRT300N v1.0 = Parallel Flash = Intel JS28FR320
Linksys WRT300N v1.1 = Parallel Flash = Samsung K8D6316UBM (Micro JTAG Port)
Linksys WRT310N v1.0 = Serial Flash = Winbond W19B320ABT7H
Linksys WRT310N v2.0 = Serial Flash = Winbond W25X32VSIG
Linksys WRT320N v1.0 = Serial Flash = Macronix 25L6405DMI-126
Dlink 2100AP - use /byte_mode
Several new serial flash devices - Thanks Lom
And many more
Actually the cable shipped with a cd which contained tjtag3.0.1. Problems were resolved after getting v3.0.2 and
was finally able to debrick the router by erasing the nvram
. Have tried everything countless 30/30/30 reset's, static IPs (in 192.168.2.8 and 192.168.1.8 ), DHCP, everything but it just turn on. Even on pinging it, all requests time out and neither the cable status (which is unplugged) ever changes. Its dead as brick.
.
