Tx-55cx400b Screen goes blank after 10 minutes

Tv goes black whilst watching it sound remains working.

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So now the tv has stopped shutting down but the centre seems dark how difficult is it to replace the back lights and how to I test to check that that is the issue?

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Is there anywhere to find a service manual to help with the testing procedures

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Hi @loplug

Give you some idea on LED backlight repairs...

http://jestineyong.com/led-backlight-pro...

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