Forced revert back to older firmware
This is procedure for reverting back to an older firmware. It can help you if you upgraded TV to latest firmware accidentally or buy TV with allready latest firmware.
Contents
Enabling Telnet
With the latest firmware, Samsung disabled both Ex-Link console connection and external applications probably to stopping us. So you cannot create telnet connection to TV because you cannot use Telnet Enabler application. If you copied Telnet Application to TV's flash memory before you are lucky. But if you didn't please don't cry, here is the solution, however it only works for TV which support Content Library.
Trojan Horse
Historically: Trojan is a giant horse that has hidden soldiers in it and it was used first at Troya A.D.2500-3000, which is in Ãanakkale, Turkey now. Soldiers leave a huge wooden horse behind them as a gift and fade away... Enemies take that giant horse inside of city walls. But when the night comes, soldiers hidden in the horse get out and open the gates... :)
First you need enable (if not allready) copy/remove feature in Content Library Manager.
- Enter Service Menu ( quickly push [INFO] [MENU] [MUTE] [POWER] on your remote control )
- Change setting (Control -> Sub Option -> Wiselink Write -> On )
- Download SamyGO Telnet Enabler Trojan.
- Unpack and copy telnet-enabler folder to root USB and plug in to TV.
- Enter Content Library Manager -> Select USB -> Select Children category.
- Use Copy function on TV to copy Telnet Enabler as Trojan content to TV internal flash.
- Return back to main manu in Content Library Manager and select again Children but from TV flash contents this time.
- Run Run this Telnet Enabler to enable telnet access (or open the gates :) ).
Forcing to Enable Alternative Firmware if you upgraded to latest firmware
After some firmware upgrades, Samsung disable reverting firmware back to older state. Actually we were using as a solution for that, flashing mtd_exe and mtd_appdata partitions via manual flashing procedure over telnet connection, enabled with Telnet Enabler application.
Instead of flashing dump of older firmware over actually used partition which is risky, we can switch to older firmware via this simple hack. This way is safer than other approaches. Code bellow unhides alternative firmware in TV.
Notice: These code lines are as an example for B650-B750 devices, so firmware name contains T-CHL7DEUC, for other TV's you need to use corresponding version string of previously installed firmware and corresponding missing Version file (Version.0 or Version.1)!!!
localhost login: root -sh: id: not found # cd mtd_rwarea/ # ls -l Version.* -rwxr-xr-x 1 root 0 44 Jan 1 1980 Version.1 # cat Version.1 SWU_T-CHL7DEUC_003000_I02_EK000DK000_100125 # echo SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816 > Version.0 # ls -l Version.* -rwxr-xr-x 1 root 0 44 Jan 1 00:00 Version.0 -rwxr-xr-x 1 root 0 44 Jan 1 1980 Version.1 # cat Version.* SWU_T-CHL7DEUC_002004_I02_ES000DS000_090816 SWU_T-CHL7DEUC_003000_I02_EK000DK000_100125 #
After this, disabled "Alternative Firmware" selection in standard TV's Support / Software Upgrade Menu becomes enabled and populated again. You can switch to previously flashed firmware and then flash some safe firmware over the latest firmware which has restrictions.
Revert to older firmware flashing images by hand
WIP
List Firmware links, versions and their ids
T-CHE7AUSC - 1013.0 SWU_T-CHE7AUSC_001013_I02_ES000DS000_090914 http://downloadcenter.samsung.com/content/FM/200909/20090922135709687/2009_DTV_2G_firmware.exe
T-CHEAUSC - 1012.3 SWU_T-CHEAUSC_001012_I02_ES000DS000_090907 http://downloadcenter.samsung.com/content/FM/200909/20090922132250765/2009_DTV_1G_firmware.exe
T-CHL6CIPDSEUC - 1008.0 SWU_T-CHL6CIPDSEUC_001008_I03_ES000DS000TS000_091112 http://downloadcenter.samsung.com/content/FM/200907/20090720125047140/T-CHL6CIPDSEUC.exe this is not valid link anymore
T-CHL7DAUC - 2001.1 SWU_T-CHL7DAUC_002001_I02_ES000DS000_090921 http://downloadcenter.samsung.com/content/FM/200911/20091127101733312/T-CHL7DAUC.exe
T-CHL7DEUC - 2005.0 SWU_T-CHL7DEUC_002005_I02_ES000DS000_090930 http://downloadcenter.samsung.com/content/FM/200910/20091030222802906/T-CHL7DEUC.exe
T-CHLCIPDEUC - 2006.0 SWU_T-CHLCIPDEUC_002006_I02_ES000DS000_091112 http://downloadcenter.samsung.com/content/FM/200909/20090921214320562/T-CHLCIPDEUC%5B__________PX__%5D.exe this is not valid link anymore
T-CHU7DAUC - 1008.0 SWU_T-CHU7DAUC_001008_I02_ES000DS000_090701 http://downloadcenter.samsung.com/content/FM/200908/20090806125546515/T-CHU7DAUC.exe
T-CHU7DEUC - 3000.G SWU_T-CHU7DEUC_003000_I02_ES000DS000_091111 http://downloadcenter.samsung.com/content/FM/200911/20091124161213125/T-CHU7DEUC.exe
T-CHUCIPDEUC - 3000.0 SWU_T-CHUCIPDEUC_003000_I02_ES000DS000_091112 http://downloadcenter.samsung.com/content/FM/200911/20091119185403937/T-CHUCIPDEUC%5B__________PX__%5D.exe
