I spilled water on keyboard, beeping at start

Hello, I spilled water & then cleaned up and put hair dryer so close it melted the keys and then brushed the keys and 5 came off. I use wireless keyboard so I can still use. Problem is when I start blank screen --loud beep and blank screen. I can bypass it by pressing f12 & still use the computer and restore did not help & it will log off and retart ok, but when I shut down--loud obnoxious BEEP & black screen. Read about taking off ram. Water fell on right side of keyboard.

You can get replacement keys on eBay. Toshiba sattelite 135A. Hard drive is almost full. Some people say take apart and clean....how do you undo a laptop? thnx