After visiting the Home Show last week, I decided it was finally time to modernise my AV equipment slightly.  PB Tech had a stand showing off some shiny LCD TVs and media players which caught my eye, so the next day I was down to their store to take advantage of their "home show specials".  I headed home with a Sony 40" LCD and an AC Ryan Playon DVR-HD with 2TB HDD (http://www.pbtech.co.nz/index.php?item=DVAACR7620 and http://www.playondvr.com/en/).  It seemed like a great solution to the need for a DVR that could record Freeview HD with the bonus of being able to add it to my network and use it to play all sorts of other media, with a reasonable amount of storage and much more flexibility when compared the the MyFreeview style DVRs.

The problem is that when using it to view/record TV One or TV2, the video and audio regularly break up, often enough to make it unwatchable.  These channels are showing just fine using the tuner built into the Sony LCD, so I'm fairly confident in the quality of the signal getting to the unit (I live in an apartment building that has a professionally installed distribution system).

I've tried updating the firmware but that didn't help.  I took the unit back to the store and described my problems, so they gave me a replacement unit which shows exactly the same behaviour.  I tried the unit around at my friends place in case there was a source of interference from one of my neighbours that was upsetting the tuners in the DVR but not the Sony LCD, but it had the same problems there too.  It receives all of the other Freeview channels without any problems.

Has anyone got any suggestions for things I can try to get it to work reliably?

Thanks,
Jason