need help to unbrick SB6121

This is JTAG to debrick any JTAG device. Modem, cable boxes, dish boxes routers.
XonA
Posts: 5
Joined: Fri Mar 21, 2014 11:03 am

need help to unbrick SB6121

Post by XonA » Wed Jan 28, 2015 2:32 pm

Hello there! My SB6121 is bricked, I am trying to restore the 8mb dump on AllFlash, programing goes well (at least usbjtagnt is saying so) but when i turn on the SB6121 the situation is the same... all lights are on, ethernet is not recognised.

Is there someone that had this smiliar problem!?

I need to mention that i programed the chip also with SPI Programmer, but the situation reminds the same!

I need help, thank you

usbbdm
Posts: 8628
Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm » Wed Jan 28, 2015 3:29 pm

XonA wrote:Hello there! My SB6121 is bricked, I am trying to restore the 8mb dump on AllFlash, programing goes well (at least usbjtagnt is saying so) but when i turn on the SB6121 the situation is the same... all lights are on, ethernet is not recognised.

Is there someone that had this smiliar problem!?

I need to mention that i programed the chip also with SPI Programmer, but the situation reminds the same!

I need help, thank you
You need to do cmpram after the program to make sure the program is correct.

XonA
Posts: 5
Joined: Fri Mar 21, 2014 11:03 am

Post by XonA » Thu Jan 29, 2015 12:12 pm

hello there... I'm using always cmpram, and everytime I get the Data File OK result, further more, I am postig the steps that I take to derbrick it:

-speed 2
Time 00:00:08 (.962)
-getram 0 800000
Time 00:00:35 (.231)
-erase 0 800000
Erase starts...
Erase time 00:00:52 (.421)
-getram 0 800000
Time 00:00:35 (.243)
L:\ORIG#8KR\00000000.bin loaded
-program 0 800000
Erase starts...
Erase time 00:00:52 (.511)
Program Starts...
Program speed 414.25 KB/s
Program time 00:00:20 (.250)
Program pass, if no further programming needed, power off/on the target
-cmpram 0 800000
Time 00:00:35 (.235)
Compare data OK

usbbdm
Posts: 8628
Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm » Thu Jan 29, 2015 2:01 pm

Then are you sure this binary file works on another modem? If yes then this modem is hardware damaged. Otherwise check the source of the file.

XonA
Posts: 5
Joined: Fri Mar 21, 2014 11:03 am

Post by XonA » Thu Jan 29, 2015 3:08 pm

When i type -flshdct 0 I'm getting:
Found Address= 00000000 SFDP MX25L6405D
Is this OK !?

Actually I don't have another modem to try it, but I think that this modem has an hardware issue, because no firmware is working...

CAPONE
Posts: 5014
Joined: Sat Dec 27, 2008 3:25 pm

Post by CAPONE » Thu Jan 29, 2015 4:21 pm

It may also be that something is corrupt in the file you are writing to the modem.
Did you make a backup before testing with this modem?
If so then it can be reconstructed if it is corrupt.
"If you give a man a fish you feed him for a day. If you teach a man to fish you feed him for a lifetime."

XonA
Posts: 5
Joined: Fri Mar 21, 2014 11:03 am

Post by XonA » Fri Jan 30, 2015 5:15 am

Yes i tried a plenty of backup's instead mine that i've made before the programming!

When i power ON the modem, all lights stay solid ON, after that i put usbjtag in the cable, all lights go off! Even if i put only JTAGNT on it... without connecting the USB cable on the JTAG!

Bugman1400
Posts: 16
Joined: Tue Jul 06, 2010 1:18 pm

Post by Bugman1400 » Sun Mar 08, 2015 9:59 am

I also made an AllFlash backup but, after reading a bit, I am not sure the reading or the file is not corrupt somehow. Its an 8192KB file but, I don't think I ever wrote it back into the modem to see if it still functions as it should. So, the question would be.....does anybody have the full dump backup for an SB6121 modem that they are willing to donate? It would be nice to post one in the Download section with the other donated backup firmwares.

I guess that would include the MAC, serial, and certs but, Im not sure it matters if that is copied several times over since the MAC and certs would need to be to a local subscribed account to get online. So, that would allow users with a bricked modem to start from a known baseline and then go from there.

kino0924
Posts: 23
Joined: Thu Jul 31, 2008 3:08 am

Post by kino0924 » Fri Jul 12, 2019 12:02 am

sorry for digging old post.
I made corrupt backup and ended up bricking sb6121
can someone post full dump?


Thanks

usbbdm
Posts: 8628
Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm » Fri Jul 12, 2019 12:18 pm

kino0924 wrote:sorry for digging old post.
I made corrupt backup and ended up bricking sb6121
can someone post full dump?


Thanks
Give me your email address and I can email you the backup.

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