No audio on playback but YouTube etc work??

[#1]

I've be searching and searching with no result for the problem I have.  I have a WDTV Live (WDBGXT0000NBK-AESN with 1.09.10 firmware).  Until yesterday I had no problems at all with playback of video files, either over wireless network or via attached external HDD.  I was playing a .tsi file from my external drive and with only a few minutes of the file left the playback stopped and all I got was the black screen with the arrow going around in circles.  I tried turning off the player and back on again but whenever I tried to play a file I got the same thing, a black screen with the rotating arrow eventually after a while I was able to play the video but got no sound.   I did a hard re-set via the pin hole in the bottom of the unit, the files now playback but I still get no sound, I have tried a power cycle with no result. 

I don't believe it's the audio settings (HDMI directly to TV only) as when I got to YouTube or RedBull TV the audio and vido work perfectly.  The same happens with MP3 files, it shows they are playing but there is not sound.  I have tried various audio settings but nothing works, and no the mute button isn't on.

I did the firmware upgrade at least a week before this issue started.

Can anyone help please?

Thanks in advance.

[#2]

Please edit your post to add the missing information while adhering to the specified guidelines on the right panel in order for this issue to proceed from "More Info Needed" to "In Review". This Issue shall remain frozen until this has been done. Regards, Jubei04.

[#3]

I've managed to sort out the problem, I did a factory reset and the sound is now operational.

Thanks.

[#4]

http://community.wdc.com/t5/WD-TV-Live-Streaming-Issue/No-audio-on-playback-but-YouTube-etc-work/idc...