We have a sony bdp 300 DVD. We updated the

Hi

This certainly looks like a potential firmware issue especially if the Audio is there on the previews. There are reports also of recent firmware updates causing problems on some other Sony BDP units.

You might want to try a Blueray cleaning disk which you can purchase from any good Audio store first to ensure there is not a problem with dirt on the lens that may be causing this. Simply insert and play like a normal disk and it provides a cleansing action to the lens.

Otherwise my advice is to contact Sony directly to discuss the matter and find out if there have been any recent firmware issues.

The most recent update for your unit is firmware version 4.9 and this was released on 12th June 2009

The support phone number for Sony Blueray Players is 239-768-7547

Hope this helps. Please do rate this answer. Many Thanks.