cannot power on MacBook Pro despite SMC and PRAM resets

Hello Apple Expert(s),

I have a macbook pro that is simply dead. I have tried an SMC reset, a PRAM reset, and I bought a new battery. I see the green lights on the back of my battery and the power cord is an apple cord that appears to be just fine. I have also tried to power on the computer with the power cord plugged in but the battery out. This computer is out of warranty and I'm hoping someone has a suggestion of a trick to try other than calling Apple or scheduling an appointment at an Apple Store.

Worth noting that I do not hear any fans, any clicks, or *any* indication that the computer is trying to power up. The only signs of electricity are the green lights on the battery and the small charging light one sees on the cord when plugged in to the computer.

Many thanks for any suggestions or a potential diagnosis.

Best,

nkb