Posted by duanev on Nov 08, 2016; 6:41am
URL: https://itus.accessinnov.com/Current-state-of-Sheild-recovery-knowledge-tp1249.html

Attempting to resurrect my Sheild (I had it upgraded to 1.51sp1 in March but haven't touched it since) but today it doesn't boot  :^

Via the serial cable it looks like I'm at a place similar to:
http://itus.accessinnov.com/How-do-I-completely-reset-td131.html
where I can't get to stage 3:

    ...
    reading u-boot-octeon_sff7000.bin
    Could not read u-boot-octeon_sff7000.bin, trying failsafe
    Error: environment variable octeon_stage3_failsafe_bootloader is not set.
    Octeon sff7000#

except that:
1) I only have an itusrestoreimage (no u-boot-octeon_sff7000.bin or other image files)
2) no dhcp command (why?)
3) no bootoctlinux (is this a binary file instead of a boot command?)
3) loadb/xmodem isn't downloading anything - they just time out
    (I'm using linux, screen, and sx from lrzsz - don't have windows)

Octeon sff7000# version

U-Boot 2013.07 (Development build, svnversion: u-boot:exported, exec:) (Build time: Dec 01 2014 - 16:34:53)
mips64-octeon-linux-gnu-gcc (Cavium Inc. Version: SDK_3_1_0 build 32) 4.7.0
GNU ld (Cavium Inc. Version: SDK_3_1_0 build 32) 2.23.52

On Linux I can use:
    # screen -L /dev/ttyUSB0 115200

Also tried minicom but with default settings I see output but can't type.


I do have an SD card but # mmc list never shows device 2.
I've formatted the SD card as close to: http://itus.accessinnov.com/Build-your-own-OpenWRT-Image-td422.html
as possible (with a type c FAT32 and a type 83 ext3 partition) but it won't show up.


Any ideas?  It would be really nice to get the sd card to work...

Is it possible to load and execute the itusrestoreimage manually?

For 10 watts it sure does get hot ...

And has anyone else seen that spark that sometimes appears when plugging the power into the Sheild?