Telnet enabler : "Not available" error

[erdem_ua]

Some users reported Firmware hack works on new firmware series. Since program gives no error, I can say that it's compatible too. But I don't flash it and don't wanna update to 3000.2 because of constrained Content Library...

I tried install hack FW 3000.2, but TV said: no new FW ...

What is your installed fw? Do you try to install 3000.2 on to 3000.2 ? This could be give error like that.
Might be you can alter version number of hacked firmware to 3000.3 that available at some of txt files. I think this will allow you to update firmware on to 3000.2

[erdem_ua]

I don't want to believe. Since terminal ExLink is not working, Telnet enabler doesn't work too. And we cant flash it onto this version by altering version number. How could we revert this back?
It looks like first step is access to linux shell again.

I think using ExLink could access to shell. Debug menus removed but how about CTRL+C approach? Does it working? Is there "debug" string work on exlink?( Serial input enable ).

[sbav1]

Yes, i tried to install patched 3000.2 on to 3000.2 orig. I also tried as you wrote, i changed version to 3000.3 at:
version_info.txt, serial_temp and info.txt, but no success ...

Apparently the new firmware (patched, not patched, doesn't matter) can be flashed ONLY ONCE.
After that, unsigned (or xor-encrypted - ?) firmwares won't be accepted any longer.
Also firmwares with lower major/minor version numbers are directly forbidden.
Further updates can be flashed only if signed with proper encryption key; any lower (or same) versions will be rejected.

Looks like good old "state-of-the-art xor-only encryption" times are over