I was watching tv and then it went dead, like someone cut the power. Now I can't get it to come on. TV service working in neighbourhood. I can't find a manual on/off button on my tv to make sure it's on before writing the darn thing off! It's not even 4 years old. It's a 48" Samsung 1080p 120Hz flat screen - not plasma, the other kind - built in 2009 model code LN46A650A1FXZC. Any ideas? It's not responding to the remote and I put new batteries in it to be sure. And everything is plugged in where it should be. It just went dead. Screen went black and sound cut off. Any ideas?? Lynne

SOURCE: sound yes, but no picture on tv

If you have sound on the stations this is a problem in the display. Take bright flashlight and hold it against the screen. Look for an image around the edge of the flashlight. If you see an image then it's one of three problems;
1) The inverter board is bad.
2) The CCFT (cold cathode fluoresent light) are bad.
3) The power supply to the inverter board is bad.
Someone knowledgeable in electronics can replace the bad part(s).

SOURCE: 50 inch Plasma Samsung HP-T5054 appears to have power however...

check the power inverter on the power strip. also check the caps on the board and if any of those caps have a round top it is bad and needs to be replaced. i hope this helps.

SOURCE: I have 40? LCD Samsung flat screen TV model:

check power supply capacitors..i repair these every day and the power supply is prone to faulty capacitors..the capacitors should have flat tops and if they are bulging or leaking brown fluid, replace

SOURCE: Samsung flat screen T.V with sound problems.

Sounds like the issue is with the set top box of your cable or direct tv provider. Please swap that receiver for the equivalent or a more updated version.If the problem persists. Verify that all inputs on television is correct. It should match. Output of source( digital receiver,dvd player) to Input( television ). Make sure all is secure. Good luck