I have just come home after buying a new sata power adapter(sata to molex converter) for my friend. It burned away yesterday. He had bought the PC last week. There was no earthing in his home. two days after he bought a new graphics card. I connected it, started the PC and shooo...the mother board burned away. We got it silently replaced from the dealer(saying him that the motherboard was faulty)

. Day before yesterday, smoke and terrible burning smell came from the new hard disk. That day itself, we did the earthing, fearing that no-earthing was the cause. And yesterday, the cable power cable burnt away form the junction point.
So we took the Cpu to the dealer again. As it was 9.00 Pm, he said, his technicians were gone. So we bought a spare cable for Rs 30 and just now I connected everything again.
Surprisingly, everything is working well. But there is some smell still coming from the Hard disk. I think its slowly dying. Tomorrow morning we be taking the Hd for checking.