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Hello, thank you for your message. In regards to your question, unfortunately you cannot reverse an update after install it. However, for any issue related to the functionality of the TV, check the link below: https://us.en.kb.sony.com/app/answers/detail/a_id/60594. -Oscar.
Sorry, there was a problem. Please try again later.CONTACT SONY CUSTOMER SUPPORT AT http://www.sony.com/tvsupport.
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