Good news, my S10 has resurrected from the dead! After leaving the dead S10 with the local Lenovo service centre for 3 days, I called them and was told that it was ready for collection.
I went to the service centre and the S10 was given back to me. I asked the service guy if it was the hard disk or the motherboard that was faulty and he told me that it was the LCD connecting cable that was faulty which was rather unusual. It was a good thing that it was not the hard disk or I would have to reinstall all the programmes for my wife again. From the job sheet, the S10 was actually repaired the next day itself so it was a quick job. In fact the guy there told me that they called my number but there was no answer. I could only think that it was because I had scribbled my contact number so they must have called a wrong number so I'll give them the benefit of the doubt.
And since the S10 is still within the one year warranty period, there was no charge. In fact, they did not even ask me about the warranty so I presumed they checked their online records as I did my registration online.
The verdict on the service? Pretty good. Just hope I don't have to visit the service centre again!