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/usb_start.sh
If you get error (in some models) about not existing file, try:
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 /dtv/usb/sda1/update/u-boot.bin > /dev/bml0/2 cat /dtv/usb/sda1/update/fnw.bin > /dev/bml0/4 cat /dtv/usb/sda1/update/Image > /dev/bml0/5 cat /dtv/usb/sda1/update/rootfs.img > /dev/bml0/6 cat /dtv/usb/sda1/update/boot.img > /dev/bml0/7
or you can use bml tool:
bml.restore /dev/bml0/2 /dtv/usb/sda1/update/u-boot.bin bml.restore /dev/bml0/4 /dtv/usb/sda1/update/fnw.bin bml.restore /dev/bml0/5 /dtv/usb/sda1/update/Image bml.restore /dev/bml0/6 /dtv/usb/sda1/update/rootfs.img bml.restore /dev/bml0/7 /dtv/usb/sda1/update/boot.img
Make dumps
It is good to have dumps of partitions on TV before you start playing with flashing. You need USB Fat32, working console (over ExLink or telnet).
How is your USB recognized you can see with command
df -h
Here is output of LE40B653T5W:
# df -h Filesystem Size Used Available Use% Mounted on /dev/tbml6 3.1M 3.1M 0 100% / none 10.0M 8.0k 10.0M 0% /dtv /dev/tbml7 896.0k 896.0k 0 100% /mtd_boot none 10.0M 0 10.0M 0% /mtd_ram /dev/stl0/14 11.0M 10.8M 208.0k 98% /mtd_rwarea /dev/tbml8 60.0M 51.2M 8.8M 85% /mtd_exe /dev/tbml9 28.6M 28.6M 0 100% /mtd_appdata /dev/stl0/13 189.0M 134.3M 54.7M 71% /mtd_tlib /dev/stl0/15 50.0M 7.3M 42.6M 15% /mtd_contents /dev/stl0/16 87.9M 9.5M 78.4M 11% /mtd_down /dev/stl0/12 149.0M 224.0k 148.8M 0% /mtd_wiselink /dev/stl0/17 87.0M 176.0k 86.8M 0% /mtd_swu /dev/sda1 298.0k 298.0k 0 100% /dtv/usb/sda1
Make dumps by commands:
bml.dump /dev/bml0/1 /dtv/usb/sda1/dump/bml0_1_dump bml.dump /dev/bml0/2 /dtv/usb/sda1/dump/bml0_2_dump bml.dump /dev/bml0/3 /dtv/usb/sda1/dump/bml0_3_dump bml.dump /dev/bml0/4 /dtv/usb/sda1/dump/bml0_4_dump bml.dump /dev/bml0/5 /dtv/usb/sda1/dump/bml0_5_dump bml.dump /dev/bml0/6 /dtv/usb/sda1/dump/bml0_6_dump bml.dump /dev/bml0/7 /dtv/usb/sda1/dump/bml0_7_dump bml.dump /dev/bml0/8 /dtv/usb/sda1/dump/bml0_8_dump bml.dump /dev/bml0/9 /dtv/usb/sda1/dump/bml0_9_dump bml.dump /dev/bml0/10 /dtv/usb/sda1/dump/bml0_10_dump bml.dump /dev/bml0/11 /dtv/usb/sda1/dump/bml0_11_dump
Finish!
--Juzis28 09:01, 1 January 2011 (UTC)
