Hi @suej70,

Welcome to the Sony Online Community! It is very unfortunate but the issue you are experiencing is a common exhibiting fault across the entire X8305c line. There is nothing you could have done differently in preventing the fault. The mainboard will require a replacement.

I suggest you contact Sony Support and open a case for the TV. They will be able to verify if your TV is still under warranty and can book a repair for you. Else if it is not, they still can suggest what would be the course of action.

Hope you find my reply useful.

Cheers,

Dutchice