Sony KDP-57ws550 green screen then shuts down

[grampy]

My sony kdp-57ws550 only shows a slow burst of bright green for a few seconds then shuts down and gives 10 blink intervals on standby light. I've opened the back of the set and the red and blue crts appear fine when I unplug the board from the green crt yoke. Don't know if the crt is bad or if there's something else that could be causing this problem.Any help would be greatly appreciated. Thanks guys

[minnie]

Bad green tube or screen/focus block.

[grampy]

The green crt seems to be fine when used with the red circuit board, any idea where can I get the focus/block?

[minnie]

CRT Socket #1-251-182-11 Screen/focus block #1-223-925-34