Dell Inspiron 1521 Dead

My sister asked me to look at her Dell Inspiron 1521 that will not power up at all. The battery was replaced and nothing. I checked the voltage from the transformer, it was/is reading 20v dc. I reseated both sticks of memory and the hard drive. It doesn't matter whether you use battery or wall power; nothing, no lights, no beeps, nothing appears to be running i.e. fans, hard drive doesn't spin up. I detect absolutely no life what so ever. I'm thinking motherboard but wanted to get other opinions first.

Thanks for any and all advice.

 

Hi Halo,
Thanks for the quick reply, and to answer your question yes I've pulled the battery out while connected to wall power. No luck there either. Nope to the warranty situation, its about 2 1/2 years old.