@ben73355 for a Sony KD-65X9500G the 4 blink code is an LED driver failure/LED voltage protection. This happens if your backlight strips have failed. It also happens when there is a panel error and it does not communicate with the rest of the TV, which is possibly a bad main board. Since your TV is a Sony and they have had issues with the backlights, that would be my first step.
There is a way of bypassing the 4 blink error but it is a bit different from main board to main board. We need to see your boards to possibly help you with a temporary bypass so you could at least check your back lights etc.
Adding images to an existing question
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
0