Hi. Hope somebody can help. Mum has a HT-CT60 sound bar connected to TV with optical cable. This has worked well for 12 months but had suddenly stopped working. I have changed the battery in the remote. When I press the power button on the remote, 2 lights on the sound bar illuminate briefly for a couple of seconds and then go off. No sound comes out as it seems that the unit is turning itself off immediately. Any suggestions?