What's wrong with this laptop? Hardware diagnostic question?

The other day my laptop battery dies, I was too slow plugging it in. This has happened many times through the years I've owned it. Plug it in, instantly the charge light comes on, and it can be restarted...typically anyway...

So I did that and it wouldn't restart. The charge light wasn't on either. Hmm, this is new.

So I did the ground up diagnostics- make sure the cord is attached properly, make sure it's in the wall all the way etc etc etc. All was good, just no juice, no power up.

Figured either my battery or my cord was dead. Cord plugged into a buddy's laptop, works fine. Ordered a new battery, new battery doesn't work either, nor does the charge light come on when plugged in with the new battery. Ok so it's not the battery or the cord.

Took apart- no obvious wires have come detached in any obvious way.

Is my processor shot? Why will it not charge nor turn on? Is it pure coincidence that it happened as the battery died (since this has happened dozens of times before)?

What can I do?

Acer Aspire 5471, Intel Core i5 430M