[How-To] Rollback on old FW...

[erdem_ua]

I am happy to see that my propositions lead you to find new way to enable firmware
I post twitter thread about this and placed wiki page that you can edit what you want.

WOOOHOOOO

ji035453 - from today you are my best lovely friend

YES, now I have FW2004.1 again !!!!!!!!!!!!!!!!!!!!!
I did what you wrote before my post.

I am gonna jealous about that.

[ji035453]

I am happy to see that my propositions lead you to find new way to enable firmware

That's completely true, you help me a lot and push me forward on my way step by step. Thank you, thank you very much!

[erdem_ua]

Thank you too in the name of all users which accidentally flashed their firmwares to latest version.

[ji035453]

You write echo ...ES000DS000... in the last codebox
When the version is printed on screen there ist: EK000DK000
It' a small mistake, so i have to echo EK000DK000 instead of "S", or not?

You are very carefull reader, as I was too before doing this trick . I didn't notice this discrepancy so far. But I didn't made an mistake. I'll try to do my best to explain it.

Just now I have flashed these firmwares in the TV:
SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816
SWU_T-CHL7DEUC_002005_I02_ES000DS000_090930

I copy these strings which describes firmware version from T-CHL7DEUC\image\version_info.txt files. So I really used this command in my code you pointed on:

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# echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816 >Version.0

But when I check Version.* files just now, I get:

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localhost login: root
-sh: id: not found
# cd mtd_rwarea/
# ls -al Version.*
-rwxr-xr-x    1 root     0              44 Jan  1  1980 Version.0
-rwxr-xr-x    1 root     0              44 Jan  1  1980 Version.1
# cat Version.*
SWU_T-CHL7DEUC_002004_I02_EK000DK000_090816
SWU_T-CHL7DEUC_002005_I02_EK000DK000_090930
#

As you can see, now there is a discrepancy. True is, that I must reconstruct my telnet protocol after I executed my code, because I restarted TV to switch firmwares and lost telnet connection. But I definitely did use this piece of code, because I checked the firmware version inside of /dev/tbml8 and I know and I remember, that my previous firmware was 2004.1:

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# echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816 >Version.0

And now when I cat content of Version.* files I get:

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# cat Version.*
SWU_T-CHL7DEUC_002004_I02_EK000DK000_090816
SWU_T-CHL7DEUC_002005_I02_EK000DK000_090930

It's interesting, I'll futher investigate it.

[erdem_ua]

For making your TV as a Virgin, Please flash your TV with original firmware twice with 2005.0 version. Or First with original 2004.1 than 2005.
With it, it's nearly identical as original one. There is some small glitches but I think they cant detect them without deep inspection.
And also read Warranty Article on WiKi page to know which warranty that we talking from.