automatically turn off (L40B650)

[aquadran]

No, i did not. After this command "mount -t auto /dev/tbml8 /dtv/test", the warning was appeared. In this place, i stopped follow the instructions and restart my tv...

actually you finished instructions.
did you "alternate firmware" ? or not ?
if you not, you did not followed intructions properly from begining, that mean you replaced older firmware.

[aquadran]

I:
turned off watchdog and enabled exlink in SM
Prepared appdata.img and exe.img (copy to usb root) by python and SamyGO Firmware Decrypter. It was used the firmware from links (T-CHUCIPDEUC - 3000.0)
started tv, started telnet (from children category) - login

i copy&paste this # echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816> Version.0
# bml.restore /dev/bml0/8 /dtv/usb/sda1/exe.img
# bml.restore /dev/bml0/9 /dtv/usb/sda1/appdata.img
# mkdir /dtv/test
# mount -t auto /dev/tbml8 /dtv/test
in instruction is written:
If there are not errors unmount it - after last command, which is bold, the errors (or warning) appeared. Then i restarted tv.

what you have after command ?
cat /mtd_rwarea/Version.*

but I think if you wrote into Version.0 and you have new tv, that mean you overwrite old firmware, so you not followed instruction.

[aquadran]

reply for this command is:

SWU_T-CHLCIPDEUC_002004_I02_EK000DK000_090816

I have no idea what you did now.
"copy&paste this # echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816> Version.0"
so where is your change ?

[aquadran]

I did some mistake (the "name" of firmware) when i tried to change my firmware to older one. I know it.

You did not make mistake name, but actually other big mistake.
Your situation is not clear for me. Things need first veryfication.
Join irc channel, i'll try help you.

[erdem_ua]

Since here is free community, no one could give you warranty or carry your risks for you. And there is also doubt bit I don't know if it's valid or not.
But It's always be not valid until you brick your TV.