I have had a few of these lenovo boards in my shop. I have not been able to fix one to date. They all have been nightmares. Since you spilt water on your laptop, there is probably liquid still under a chip preventing it from powering on.
SHUT IT OFF NOW AND REMOVE THE LOGIC BOARD!!!!
Place the logic board in a basin of isopropyl alcohol and let it soak for a bit then scrub the board with a toothbrush. Put the board in an oven at it's lowest setting for 5 min or so. Let the board dry for another day or so. Hopefully it will work. If not, corrosion has already taken place and now you need a good ultrasonic cleaning and or motherboard repair, or in the case of a consumer grade lenovo laptop, a new motherboard.