Why my toshibA plasma has sound no picture? - Toshiba 50HP66 50 in. Plasma Television

my tv has no picture has sound

Check the fuses on the ysus & zsus boards. Are any fuses on boards open . Disconect power cabels to ysus board first {board on left} . put tv on . if the light is green the ysus board must be replaced.

Power board require changing.It dead.

power come on but no picture.
stand by is on and when you switch the button on and not doing anything.

your y-sustain board is bad

I too have this problem with no help from hh Gregg, where I bought the tv, and no help from Toshiba. I resorted to calling the BBB and complaining about the defective workmanship. I took the tv, which is less than 2 years old, apart and found the y-sus board, behind the y-sus board is a foam rubber spacer to seperate the circut board from the backside of the screen. I think this pad is designed to prevent heat buildup in the y-sus board. The pad itself is held on by glue and that glue melted causing the y-sus board to short out. I noticed this after finding a tacky substance behind the board. The heat from the plasma screen melted this and also the pad itself. Toshiba claims no resposibility because the tv was out of warranty. Thanks Toshiba.

I have the same problem, did you fix it?

One of the fuse proballly broken in Board Z- sus due to short cicuit inside the single IC (STK 795-***) hidden under a single heat sink. This big IC was hard to remove.Be gentle when removing the 2 flexiboard.................Tarogo

My experience with 42" plasma tv's with no picture or sound was a missing power supply voltage. On the power supply board check voltages on the plug. The voltages should be marked on the board,

That problem is caused by the Y Sustainer board.