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Could the Main Logic Board in my Sony Bravia Ultra HD 4K XBR70X850B be bad?

Initially, the TV illumination light was flashing 4 times. It would turn on, had picture, but then shut off and flash lights. I replaced the T-Con board which fixed the shut off and flashing light problem. But, now I have no picture--just a blank blue screen. The back lighting seems to be working fine.

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The Knight

Sony Master 76,851 Answers
Posted on Feb 25, 2016

The Knight

Sony Master

Joined: Oct 14, 2010

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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