Hope you took extended warranty, because it can be rather expensive.
I have a lenovo 3000-g430 series laptop which is around 14 months old, till last week it was working fine, but now when i am trying to switch it on it is not starting.
The present status is when I press the power button the power LED glows along with the bluetooth LED and the HDD LED and the touch buttons to control sound, the fan moves, but after few secs the HDD LED goes off and all the other LED continue glowing.
Please note that it was a normal shutdown and had not met with any accident.
It is neither working with battery and nor with AC.