How should I approach trouble shooting a dead MacBook Pro?

This is my daughter's laptop and worked great until a series of unfortunate events. While it was open and running, she put a paper plate with warm food on the keyboard. The plate developed moisture on the bottom of it and it dripped down into the laptop.

She moved the plate to eat and at the same time went to start a video. She noticed that selected keys would not work and the trackpad wouldn't work. She then closed the clamshell for a while.

Later she opened it up and it was in the same situation. She then powered it down and used a cotton ball and alcohol and rubbed down the entire keyboard, trackpad and inside shell of the laptop believing it would displace any moisture. It then sat there overnight and the next day, it wouldn't turn on.

We can attach it to power and the LED on the power adapter does show charging then switch to green indicating full charging.

I'm trying to figure out what is wrong. Did the logic board get fried? Did the trackpad die? Can I fix this or is it permanently dead.

What advice can you give me to approach this?

Edit** inserting image to show the looping error message I get when trying to reinstall macOS Sierra to the internal SSD drive.