This is what happened, water spilled on my dell vostro 1510 laptop keyboard, I managed to turn off within 10 seconds, removed the keyboard, nothing had reached the board luckily, no smoke, no sound, later keyboard was dried, reinstalled and the following happened:
1. Laptop seems to be working normally without any problem other than keyboard.
2. Win7 OS launched successfully without any errors.
3. Keyboard: On pressing any key such as "D" triggers two keys "D" and "E", later I typed in notepad, all keys were behaving in the same manner.
I bought a new keyboard for 1310 which is compatible with 1510 models. Installed successfully.
Still the same problem remains, pressing the same "D" key triggers "DE".
carefully clean contacts of keyboard connector on mother board
isopropyl alcohol %90 available at pharmacies is good
also a pencil eraser can be used if you can get to contacts easily
I do prefer the alcohol with cotton swabs
Dont know for sure if it will work but it is worth a try
but really if those edge connectors used on keyboards have just a slight
oxidation film (beginning of rust) on it then it can cause problems
If you remember the old cartridge gaming consoles like the Ataris also
used edge connectors and after the carts got old you would have to clean them
they might still look shiny but it would still cause a problem