hitachi 55hds69

[k48saulnier]

I need help I have no video. blue light flashes 8 times on front. I have service manual and have taken voltage readings and found a few with no voltage. mainly no voltage from connection cn64 wich runs power to x and y sus boards. also cn63 terminal #8 has 0 volts and is supposed to be 3.3. cn68 is also missing some values. can anyone help. I am thinking main digital board for starters. HELP