If you dont have a tech and you dont know what your doing by all means PLEASE get a tech, That is 250v you are dealing with behind the console and it will do more than make your hair stand up. Check your 250 lights on the supply and there is a 250v power switch on the front of the supply make sure that is on even if the light is on. If you do know what your doing start checkin the E75 board, check the big green resistor (R9, R10) after that check all six trannies, those were what usually failed on boards in my town. After that ask yourself how old the caps are on the other boards, many many problems are solved by changing out old tired caps, especially on the plasma meters. Just my 2 cents