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Lcd 42 TV, acoustic solutions turns off after a couple of hours?

I've replaced the 2 capacitors 6.3v 4700f , it still goes off after an hour or so, but it now goes on to stand by sometimes, rather than just blank, when I have to turn it off & on by the manual button to get the blue light on so I can then use the remote.
Works fine when on.
Is there other capacitors that need changing?
Model LCD 42762 HDF
Thanks in advance
Jon, March 2017
Anybody got any suggestions please?

Jon, July 2017
link Click here to see other fixes for Acoustic Solutions.