panasonic th42pv60 chasis gp9de

[floapa311]

Hello,
I need little attention with chasis GP9DE, this set function with sound, no picture, no video,no OSD
I disconnect plug DG5 , panel become white, tv set don t have a error code, all the voltage is ok.
I do not have much experience with Panasonic chassis in Manual below this defect leads to the D-board, can someone help me.

Thanks a lot.