New Keyboard Installation - Select keys working

Hello iFixIt!

Earlier this year, I spilled liquid onto the Macbook Air. After around a day, when I pressed the keys it would just input weird character - not letters. Obviously it seemed like the keyboard was impacted but nothing else because once I plugged in an external keyboard, I can use the machine fine.

This morning I installed the keyboard perfectly, and re-assembled the Mac. Only a select amount of keys work "B, up and left arrow and one command"

I purchased this keyboard from eBay: http://www.ebay.com/itm/271346555131?_tr...

He has a 99.9% excellent rating.

What could the problem be? Is there another issue with the laptop? Did I receive a broken keyboard? Was it a poor keyboard installation?

Any help would be great!

Regards,

Kevin A