Known issue: 3 blinking error code. This is a common fault for this model, and replacing the main board has been shown to fix the problem.
BRAND: SONY
COMPATIBLE MODEL:
SONY
K-77XR80
K-65XR80
K-55XR80
DESCRIPTION: Main board
BOARD / PART#:
- A5069634A A-5069-634-A Main Board
NOTES/COMMENTS: Please make sure you are ordering the right part#. Same model TVs can use different part #'s.