KDL-43W805C won't switch on

[Neilfo]

I'm really hoping someone here can help.  I have a KDL-43W805C that will not switch on.  If I hold the power button down the front LED wil pulse gradualy for 2 secs then the screen flickers briefly.  I've tried disconnecting from the power and leaving for 2 hours before plugging back in.

Has anyone else experienced this issue, or does anyone know of a way to do a hard reset via a button combo press?  Many thanks.

[royabrown]

See the similar recent thread entitled 65XD9305 TV

The issue is the same (though the cause may be different) and @Marino.Manolo offers a useful link you can follow for advice.

[Neilfo]

Thanks for directing me to that post. I've tried everything in the link, apart from checking eco mode a sleep timer as I can't get to the settings, and it still won't switch on.