NO POWER

Hello,
i have a Acer Travel Mate laptop.
i working on battery power, i plugged in the Ac power adapter chord, as my battery charge was getting over.
when i plugged in the AC adapter chord suddenly my laptop went down.
now its not getting powered on.
On my charger there is a power LED that indicates that the adapter is working fine.
i tried switching my LAptop on with battery as well as without battery,but nothing seems to happen.
One strange thing when i plug in the power adapter the LED on the adapter starts blinking, which is unusual,
it never happened before.
Is there any test which i can try before handing it over to a repair shop?
Please help me its very important for me to get that laptop working..
Thanks in Advance.