I have the LG HT904TA All in one Home Theatre System plugged in to my LG 50PS60 Plasma TV with a HDMI Cable. All has been working fine for just over 4 yrs now.

Recently, while watching a DVD with surround sound on, suddenly the sound from the speakers stopped. So I rebooted both the TV & Home Theatre & tried playing the DVD again. The sound came on briefly for 1-2 seconds & went silent again.

I tried playing a program on TV & the same result, sound comes on 1-2 seconds & then silence.

So I switched to the sound from TV in built Speakers & sound is fine. I can play TV programs & DVD with sound from the TV speakers without problem.

However, if I switch the sound to the Home Theatre I get sound only for 1-2 secs & then silence (this only if I reboot the Home Theatre first).. if not then silence throughout. The DVD player in the Home Theatre works fine.

I tried with a different HDMI cable, same result.

Thanks Lex. Is the Internal Power Amp a part that I can replace? If so can you guide me on the part no? I saw only 2 major components when I opened up the HT. One is EAX61283401 & the other is EAY60568703. Is it one of these or a component on it?