Five blinking red lights

Hi I have a Sony XBR-65X750D. It has 5 blinking red lights when I turn on the tv. Almost looks like the screen is about to power on then bam. I have tried to replace the T-Con board but still have the same issue. I have tried to power reset as well. I did though however notice when I disconnected the lvds ribbon from the T-Con to the right board (main? One with all the inputs) it will turn on with no code but won't display a picture (assuming T-Con controls that) I have inspected the ribbon cable and have not seen and burn or marks that would make me think it's the ribbon. What should I be doing next?! Help!