Tv screen went black and will not come back up.

1) Is sound coming through the tv?
2) If you push menu button on remote does anything show on tv?

Any ooze coming from under a cap? The simple fix is to get another mainboard for around $45-65 bucks online from lots of sources.

Hello ? Is there any sound?

It is quite likely that the power board is at fault. Depending on your competency you could replace it. It is not unusual for the red light to be on and the power board not working. Do a google search for spares eg: spares toshiba ....... where .... is your model number. Hope this helps. Peter

Do you have back light when turning on the TV? if you do then just replace the main board should resolve the problem. if you do not have back light, you will need to replace the inverter board(s) depending on your model. The inverter board(s) is located on the left side of the TV facing back of TV. you may have two inverter boards depending on your model. the other is located on the right side of the TV. Both mount vertically.

Could be the power supply gone bad.
No easy solution I'm afraid.

sounds like a fly back problem
have a qulifyed tech check this out its high voltage leaking you are hearing.
esp if its a sqweek hiss sound.

i went to turn on the tv and the power button don't work

Same Same Here - SAMSUNG SUCKS!!! One day we lazy Americans will learn not to outsource so much and get back to good ole American Made.

did you hear the sounds? or maybe you have defective power source in hot side..