Aiya..... Nowadays electronics products are like that. Just like my Sony CRT TV. I bought it brand new but died after just 5 months of normal usage (I watch TV in the evenings only and about 2 hours each time). Good thing I bought the 5 years extended warranty from Best Denki.
My Coolermaster PSU blew up after 3 months of usage..all the H/W were not affected. Most reputable PSUs have this feature that prevents damage to your H/W. As long as you don't see any smoke coming out from the PSu, you are fine.