You have a Dell laptop, Vostro 1000. Water accidentally spilled on it. Even though a lid was shut, it will not now start.
You have tried leaving it unplugged for a day and then plugging it in, without success. What do you do now? You're going to want to let that machine dry for a while.
Take out any major components ie. hard drive, random access memory, battery, etc. and let it air dry for as long as possible. Check it carefully for corrosion after that. You will want to check battery terminals, random access memory contacts, etc. very carefully, as they will be easy places to spot corrosion.
After that machine is thoroughly dried, it may power back on.