Sorry about this, I will have to respond later as I am not able to provide the information immediately. I will reply to your question tonight (about 9 hours from now) I really should have contacted you last night!
The unit is a DVD/VHS Recorder, the Model No DMR-EZ48VEB.
I also have a second DVD/HDD recorder, DMR-EX7 68EB which has a similar problem also due to a scratched disc: the message relating to the previous recording keeps re-appearing and the unit refuses to read discs at all.
For the DVD/HDD unit: I have tried other types of disc including pre-recorded and it will not read any of them.
For the DVD/VHS unit: I haven't tried any more discs as I presumed the unit needed to complete the recovery process before I could use it again. This of course is the problem as it fails to complete the process each time it tries to reset.
The message stated that the "self-check" failed. The instructions were then to press OK on the remote, wait until the unit had switched off, then switch power on. Despite doing this, the same message reappears.
Well that's bad news for me as I think the warranty may have expired.
As for the other (DVD/HDD) unit, is there any way I can get it to read discs again or will this have to be replaced too? It keeps repeating the message about a scratched disc on the previous recording (made months ago) and will not read any type of disc. I have tried using a head cleaner but with no result.
I had a bad feeling that might be the case. I will keep the unit as the HDD still operates and it has recordings I would like to have access to.
Thanks for your assistance on this