I tried the reset solution by dissconnecting from the mains for 15 minutes but still the same problem exists.Looks like I am left up the creek without a paddle. I cant ever see myself buying Panasonic again after this debacle ,I havent had it more than 18 months and the recording side of things was the main reason I purchased it initially. As a standalone player and tuner it is ordinary.
I will still try every thing on functions and options menu again but it looks like I bought a lemon.
All avenues have not been explored or explained yet.
These questions are important for purposes of analysis so please answer them very carefully.
For one thing it was a vital part of the test that you made another test recording after the reset. Did you do that?
The reason simply is that there may be a problem with the recordings on the hard disc but not anything intrinsically wrong with the unit itself.
You need to know if a new recording will play with sound.
Another point... If you have only used 90 minutes of the HDD capacity in 18 months, then evidently you use the machine very little.
90 minutes is typically the length of a film - so is it correct to deduce that you only have one single recording on the hard disc?
If so, have you EVER successfully played back that recording from the hard disc ... or any other recording ... or was this the first time you have ever tried?
Would it be possible for you to feed any other source into it, do a test recording and see if that has sound?
One option is selecting AV1 on the DVDR as the input to record because then you should be able to record from your TV [ Not all TV's can do this so it is not as a reliable test as feeding in some other source.]
I believe Australia uses a variety of transmission methods and conceivably you could have recorded from a channel that has a different sound spacing.
[ thus no sound]
So to check all theses possibilities an essential check is find a station on the DVDR that you can monitor and observe that it has sound present , then do a short test recording and see if that will play back.
All these tests can tell us a great deal and determine once and for all if you really have a problem unit or not.
If it turns out you do, this should be a relatively cheap and easy issue to trace and put right... but you may also have justification for Pursuing the issue with Panasonic customer services ... irrespective of any guarantee expiry issues.... albeit that may depend on local Australian consumer law.