Panasonic TX-37LZD85

[pan]

Hi
The set is dead, but saying that it does sometimes fire up on switch on.
Voltages on P/S.
STB 5v ok , SUB 5v ok, SUB 9v ok, SUB 6v ok, DTV 12v ok,
But NO panel 12v.
Tried to get service manual not had any luck.
Can anyone help?

Pan