Sony Bravia TC8305A series power on then off.

Hello, I have a Sony Bravia KDL series 46in TV. It powers on, the backlight shows activity as in you can see that it wants to do something, then powers itself back off then back on in a cycle.. What could the issue be? If you tell me a board please be specific in which board would cause this and why. Thank you

Hi CraigH, 
Welcome to the Sony Community! 
Please perform the steps below to troubleshoot your issue" 
Power Reset 
Turn off the television.
IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
Unplug the television power cord from the electrical outlet.
Let the television remain without power for 60 seconds.
Plug the power cord back into the electrical outlet.
NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
Turn on the television.
Factory Reset
Unplug the TV power cord from the electrical outlet.
Allow the TV to remain without power for one minute.
Plug the power cord back into the electrical outlet.
NOTE: The TV should turn on automatically. If it does not, turn it on.
Wait approximately 40 seconds for the TV to completely start up.
On the TV remote control, press and hold the UP ARROW button.
While holding the UP ARROW button, press and release the POWER button on the TV set.
Release the UP ARROW button.
NOTE: The initial setup screen displays if the above procedures were performed correctly.
8. Follow the on-screen instructions to complete the initial setup.
If my post answers your question, please mark it as "Accept as Solution"

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    com.apple.driver.AppleBluetoothMultitouch          70.12
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    com.apple.driver.AppleUpstreamUserClient          3.5.9
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    com.apple.driver.AppleMCCSControl          1.0.33
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    com.apple.iokit.IOBluetoothFamily          4.0.8f17
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