A laptop came into the shop after the customer's son spilled tea into it. He didn't initially report the spill; he tried to handle it himself. Eventually, however, the laptop began to malfunction: it would only stay on if you press the space bar at least every two seconds.
Before bringing the laptop to me, the customer tried putting it into a bag of rice and setting it on the radiator to dry it out.
Prior to the work shown in this video, I disassembled the laptop to see if any liquid remained inside or if anything major was damaged. During that process, I only found a small amount of tea (one spot near the right speaker, another spot near the cooling fan, and some of the dust in the cooling duct had become a solid mass) and a lot of rice and rice-related dust.
I cleaned it out and put it back together, but the malfunction remained. The keyboard appears to have been damaged by the liquid and needed to be replaced. The good news is that the keyboard contained nearly all of the liquid, likely preventing much more serious damage to the computer.
On this computer, the keyboard is bonded to the top plate / palm rest assembly with numerous plastic rivet-like things, which are actually just plastic bosses that have been melted after the keyboard was put in place.
While it is possible to cut off those plastic bosses, put a new keyboard in place, and then try to re-melt what remains of the bosses to attach the new keyboard, I was not comfortable with that sort of destructive repair. Instead, I recommended replacing the entire top plate / keyboard assembly. This video shows that process.