Water spill - no power no magsafe light - signs water damage

Okay, here's the backstory: working on my mother in-law's mid 2010 Macbook Pro 13".

She claims she spilled a glass of water on it (smelled more like wine to me). In any case got the computer a couple of days after the incident. Took it apart, visible signs of corrosion on the bottom of the logic board. Removed and soaked in isopropyl alcohol for a day. Brushed it lightly with a toothbrush, Reinstalled.

No love. No reaction from the power button. No light on magsafe adapter.

Ordered a new battery.

No love. Same. Nothing from power button or magsafe adapter.

What should I do next?

Want to figure out if it's the logic board or if it could be something else (keyboard? Power Button? All three?).

Any advice would be greatly appreciated.

FWIW - Hard drive is fine - pulled it and it has no problems.

What's the cheapest way back to a working computer?

Thanks,

Anthony

Ok, replaced dc-in board - no luck.

Still no magsafe light or any indication the computer is powering up.

What's the next part to troubleshoot?

Any help, greatly appreciated!