Hi there. Well I was able to repair the original hard disk, and then loaded the factory restore partition. Then I copied everything onto another hard disk and will keep the original for long term backup.
I don't like the modern practice of not supplying backup system disks. It is the equivalent of charging for carry-on baggage. Sony and its partners did not have a system restore package for sale for this model. So I am glad that I managed to fix it myself.
Thank you for your support Vincent. Keep up the good work!
chromian
Problem solved. Thanks.