There are three lights on your laptop; which one is blinking?
The first one is the hard drive light on the right side in front of the SIM slot or where the SIM slot would be if yours isn't equipped.
The second is the AC adapter light on the right rear, next to the power plug.
The third is the power light on the left rear side embedded in the power button.
What are the other two lights doing? Any reaction on either of them?