Television and Home Theater

I have a sony KDF-E55A20 and it will power on for about 45 seconds and then off for 45 seconds and then off and on till I turn it off. There is a  red code of 5 flashing.

Does anyone have any suggestions??????  Please HELP...................

Thanks,

Paul

I have a WD-62725 with a problem slightly different from most postings I have seen. When I turn it on it powers up ok but automatically goes to a checkered pattern screen. the pattern has small rectangular checkers on it that alternate light blue and dark blue. I can not get any of the menus to display through the checkers. When I switch input devices it goes blank for a second and then returns to the checkered pattern. There are no error or flashing lights at all. When I hold down the menu and device buttons for a diagnostic check the code I get id 1-2......"no errors detected".

Can anyone help? I bought my Samsung lcd tv ( model LE52M8 ) about 3 months ago. It recently started to make a buzzing noise when i switched it on, then today it gave 1 loud buzz and there was no picture but perfect sound. I have tried unplugging the tv for a few hours and switching on again to no avail the problem persists, anyone got an idea? HELP!!!!