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How To Downgrade webOS TV Firmware Tutorial


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LGDTVUPDATER  
 
1. Download LgDTVUpDater [ 

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 |  ] Updated 19 OCT 2015
2. Unrar and put LgDTVUpDater folder in C:\
3. Open C:\LgDTVUpDater\dns\AcrylicHosts.txt
4. Change 192.168.0.11 with your 
5. Save and exit
6. Go back to C:\LgDTVUpDater folder
7. Run startDNS.bat and don´t close it
8. Run startHTTP.bat and don´t close it
9. Go to TV Menu > Network Settings > Ethernet/WiFi > Edit > Uncheck Set Automatically > Change DNS IP to your local IP address > Connect
10. Go to General > About This TV > Check For Updates
11. Accept downgrade to the first firmware TV
12. Restart TV

13. Back to TV Menu > Network Settings > Ethernet/WiFi > Edit > Check Set Automatically
14. Go to General > About This TV > Check For Updates and follow TV instructions OR download available Software_File dedicated for your TV, unrar and put *.epk file in LG_DTV folder at USB stick
15. Mount USB stick to USB port at your TV then accept upgrade when message prompt on the screen
16. Restart TV and follow TV instructions

 
For best performances go to TV Menu > General > Reset to Initial Settings
 
 
Voila!  ;)
 
 
 
NSU EMU BY SMX
 
If your attempt to downgrade your TV with LgDTVUpDater for some reason was not successful, you can try to use tool prepared by SMX.
Everything you need - NSU Emu by SMX and how to use it - you can found .

 

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1. Worked like a dream for me downgraded to 3.23.13

2. Rebboted now upgrading via manual update.

3. Upgraded to 4.30.16

4. Reboot and tv has found update via automatic update which is in progress

5. Udpate 5.00.04 installed

Straight forward and worked without issue.

Thank you Simon.

David Isom

Shóuld have said after step,one dns was put back to normal and pc software stopped.

The manual and subesquent updates came via the web......

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Updated for higher TV models, tested, uploaded. ;)

This didn't work for me. This is what the dummy file has.

<REQUEST>

<PRODUCT_NM>webOS</PRODUCT_NM>

<MODEL_NM>HE_DTV_WT1H_AFAAATAA</MODEL_NM>

<SW_TYPE>FIRMWARE</SW_TYPE>

<MAJOR_VER>05</MAJOR_VER>

<MINOR_VER>00.04</MINOR_VER>

<COUNTRY>US2</COUNTRY>

<DEVICE_ID</DEVICE_ID>

<AUTH_FLAG>N</AUTH_FLAG>

<IGNORE_DISABLE>N</IGNORE_DISABLE>

<ECO_INFO>01</ECO_INFO>

<CONFIG_KEY>00</CONFIG_KEY>

<LANGUAGE_CODE>en-US</LANGUAGE_CODE>

</REQUEST>

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Thank you SIMON, you saved my 49UB850V, i used your tut to downgrade from 5.00.04, and worked like a charme

 

Nice to know that it works for others, though regretting that not for everyone will. 

Maybe next update will be better for your TV. Meanwhile, thank you for your opinion and I wish you to make it happen.  ;)

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