Black Screen & Battery Not Charging & Keyboard Not Working

Hi Everyone.

MacBook Pro 15" Retina Display Late 2013

Background: I split a whole cup of tea to my Macbook Pro 3 weeks ago.

Current Issue:

1. The keyboard is not Working.

I changed to a new keyboard, still not working.

2. The battery is not charging.

The power source show is the power adapter, and the battery is not charging, even changed to the new battery.

3.Display is Black.

The display is black, but if you use the flashlight, you can see graphics on it.

Now I’m using HDMI to connect to other monitors using it.

The battery is not charging, and the computer gets very slow when the battery drops to 4%.

Safemage’s light is not on, not green, no orange. Just no light on.

After I shut down my computer, there is no way I can open it. If I disconnect the Magsafe for 15 seconds and replug it, then the computer will automatically open. I need to wait 15 seconds and use a flashlight to see the screen, input username, and password, and then open it. Then I can use the second monitor.

Please give me a solution. What should I do? Change which parts?

Thank you.