VIDEO VIEWING WENT OUT. BLACK SCREEN WHEN TRYING TO VIEW TV OR ANY SOURCE, I BELIEVE MENU STILL WORKS. (THIS HAPPENED A FEW MONTHS AGO) I AM INTERESTED IN REPLACING THE BOARD. SINCE THIS WAS A HIGH END MODEL THERE ARE MORE BOARDS THAN USUAL. DOES THIS SOUND LIKE THE MAIN BOARD? I AM NOT NEW TO REPAIRS, ANY TROUBLESHOOTING IDEAS TO ISOLATE THE BOARD IN QUESTION. IF THIS AREA IS TALKING ABOUT THE OWNERS MANUAL I HAVE ALREADY READ.