No sound

I have exactly the same problem, but i was watching tv. Sound stopped and i thought it was just dodgy bbc/itv channels, but then i tried my laptop, ipod, cd player, dvd and nothing. even tested the sound, still nothing. Pulled everything out and re-plugged my speakers in and just my ipod, still no sound, even with the headphones plugged in. Only had it 18months and this happens. What is it these days with electronics? I have an old gettoblaster in the garage, had it since the late eighties and it's still working..... I also want help. Was told that it's probably a resister but they had it 4 weeks and still couldn't solve the problem-maybe the electronic volumes gone-they could not fix this....