spilled water on keyboard at startup screen would turn on then off

Water was spilled on the keyboard and upon drying out the keyboard and screen would turn on and at the password prompt the screen goes black. After I hit any random keys on the keyboard the screen goes blue and the screen will come back on for about 5 seconds and go black. I turn the screen on at anytime by using random keys on the keyboard and logon to the computer for 5 seconds then it goes glack. For some reason the command key always will turn the screen on. After the damage I cleaned the board and reinstalled it. The first time I turned the notebook on after that I was able to log on and play itunes for about 5 minutes. I thought I fixed it. I turned it off and now it is doing the same thing. The green power cord light is strong and the battery holds a charge. It appears the computer is working in the back ground but the screen is timing out. Please help.