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Hello, my name is ***** ***** I'll assist you. I need additional info to troubleshoot the issue.
- When did you get TV firmware update and is the problem occurred right after firmware update?
Thanks for the info, it seems problem is failing main board of TV and main board replacement will help to resolve the issue. Please take off back cover of TV after removing screws around the back panel to access inside TV and get the part number written on label pasted at main board to search/ google it to get price and stock info to order it if you wish to replace it in TV yourself.
If you are not comfortable working on it yourself then you may please use following link to get list of TV repair shops in area which will help to get repair quote...http://www.tvrepairpros.com/I trust my input will help you out. Please feel free to respond if you have any additional questions.A positive rating to answer would be greatly appreciated, please click on 5 star on this page then click submit/finish button so I can get credit on website for my work. Regards,Shahid.
Main board replacement is plug in type work, no soldering work is needed and my answer is based on info mentioned in this question so I'm sure it is main board issue.
I hope these info will help, please feel free to respond if you have any additional questions.
Main board is that has all video inputs.
Pasted on the main board and part number would be like BN94-05874F or some thing similar.
encompass.com or partstore.com or shopjimmy.com are best place to get replacement boards and if ebay supplier gives warranty for the main board then it worth to give it try as it will save you r money as well.
Sounds good as reset did the work to resolve the problem. Please reply back if problem reoccurs.