Recovery of Bricked Device
Contents
If you write bad boot.img to tv.
A) Connect to TV by ex-link cable.
B) Enable USB support. Command "/lib/modules/rc.local"
C) Enable NAND support. Commands
# insmod /lib/modules/fsr.ko # insmod /lib/modules/rfs.ko # insmod /lib/modules/fsr_stl.ko
D) Erase old bad image. Command "bml.erase /dev/bml0/7"
E) Write original (work) image. Command "bml.restore /dev/bml0/7 /dtv/usb/sd1/boot.img"
It all!!! Happy new Year.
Restore TV from u-boot
Go here
Restore firmware (exe.img, appdata.img) images (CI only)
Before to start
To restore TV you need:
- Settings in Service menu are set before TV broke - do it now, if your TV isn`t broken - insurance for future :)
- Enter Service Menu ( quickly push [INFO] [MENU] [MUTE] [POWER] on your remote control )
- Change setting for your RS232C interface to "debug" ( Control -> Sub Option -> RS-232 Jack -> [ Debug | UART | Logic ] )
- Change setting for Watchdog to "off", so that the device doesn't reboot while you are in uBoot menu ( Control -> Sub Option -> Watchdog -> [ on | off ] )
- Make or buy Service Cable - ExLink
- You need images to restore (or dumps of partitions you made before. How to make dumps read here.)
- If you use firmware files from firmware upgrade file (you can download it from here, make sure, that you have UNxored exe.img and appdata.img on USB/update (NOT exe.img.enc and NOT appdata.img.enc). How to unXOR images read here.
Prepare USB
- 1. Format USB to FAT32
- 2. Copy required images to /update directory on USB.
- 3. Place exe.img and appdata.img to USB/update
- 4. Reboot TV, go to TOP Debug menu
- 5. Enter Ctrl+c to get to console. TV from this moment does not respond to RC.
- 6. Mount USB disk with next command
sh +x /sbin/start_usb.sh
- 7. Check if USB is mounted
cd dtv/usb ls
You get something like:
log sda1
- 8. Check images on USB/update
cd sda1/update ls
You get:
Image exe.img oneboot.bin uboot_env.bin Image_serial fnw.bin rootfs.img validinfo.txt appdata.img info.txt serial_temp version_info.txt boot.img onboot.bin u-boot.bin
- 9. Prevent TV from rebooting when exeDSP is stopped
/mtd_boot/MicomCtrl 23
- 10. Kill exeDSP
killall -9 exeDSP
- 11. unmount /mtd_exe/ and /mtd_appdata/
umount /mtd_exe/ umount /mtd_appdata/
- 12. Write âexe.img and appdata.imgâ to TV
fsrrestore /dev/bml0/8 exe.img; fsrrestore /dev/bml0/9 appdata.img; fsrrestore /dev/bml0/10 exe.img; fsrrestore /dev/bml0/11 appdata.img;
- 13. Mount the updated images
mount -t auto /dev/tbml8 /mtd_exe mount -t auto /dev/tbml9 /mtd_appdata
- 14. Start exeDSP again (Do not worry if screen is bottom to up, after restart TV you get normal operating TV)
/mtd_exe/rc.local
Flash another partitions from console
- 15. If you need restore some other partitions, you can do it as example:
cat /dev/usb/sda1/update/u-boot.bin > /dev/bml0/2 cat /dev/usb/sda1/update/fnw.bin > /dev/bml0/4 cat /dev/usb/sda1/update/Image > /dev/bml0/5 cat /dev/usb/sda1/update/rootfs.img > /dev/bml0/6 cat /dev/usb/sda1/update/boot.img > /dev/bml0/7
or you can use bml tool:
bml.restore /dev/usb/sda1/update/u-boot.bin /dev/bml0/2 bml.restore /dev/usb/sda1/update/fnw.bin /dev/bml0/4 bml.restore /dev/usb/sda1/update/Image /dev/bml0/5 bml.restore /dev/usb/sda1/update/rootfs.img /dev/bml0/6 bml.restore /dev/usb/sda1/update/boot.img /dev/bml0/7
Make dumps
bml.dump /dev/bml0/2 /dev/usb/sda1/dump/bml0_2_dump bml.dump /dev/bml0/3 /dev/usb/sda1/dump/bml0_3_dump bml.dump /dev/bml0/4 /dev/usb/sda1/dump/bml0_4_dump bml.dump /dev/bml0/5 /dev/usb/sda1/dump/bml0_5_dump bml.dump /dev/bml0/6 /dev/usb/sda1/dump/bml0_6_dump bml.dump /dev/bml0/7 /dev/usb/sda1/dump/bml0_7_dump bml.dump /dev/bml0/8 /dev/usb/sda1/dump/bml0_8_dump bml.dump /dev/bml0/9 /dev/usb/sda1/dump/bml0_9_dump bml.dump /dev/bml0/10 /dev/usb/sda1/dump/bml0_10_dump bml.dump /dev/bml0/11 /dev/usb/sda1/dump/bml0_11_dump
How is your USB recognised you can see
mount
Finish!
--Juzis28 19:11, 28 December 2010 (UTC)
