I have  Bravia KDL-40EX503 and also a Sony SU-B401S stand/soundbar. I know this product is made for the KDL-40NX723 but this appears to be only in the bracket design which I can easily modify to fit my Bravia. Sony states also:

Compatible Products:

All 102 cm / 40" LCD TV screens

http://www.sony.co.uk/product/tpa-tv-stands---wall-brackets/sub401su/compatible-products#tab

In connecting the soundbar I was only to get muffled sound through the rear bass speaker and no sound at all through the smaller front speakers. The kit is brand new, I used the supplied HDMI cable, correctly plugged it into HDMI1 (ARC) and the rest of the instructions are too simple to go wrong. My firmware is up to date.

My question is – what else can I try or is the product likely to be faulty?

Message was edited by: fastship