Macbook Pro won't start up after removing and putting back battery

One week ago I spilled two drops (literally) of water on the drag pad of my MacBook Pro (model A1278). Some of this water went down the top edge of the drag pad. Since this happened, the cursor as either not been been responding at all to my drag pad, or it has been behaving very eratically, as well as this, over the last couple of months since buying this MacBook, there has been an abnormal amount of dust in the air in the house due to some building work going on here. This being so, I decided to follow a video tutorial in you tube on how to remove and clean the drag pad. This involved getting access to the laptop by unscrewing the back, unscrewing and disconnecting the battery, then unscrewing and disconnecting the drag pad, so this it could be handled and cleaned. I followed the video to the letter, taking great care. I cleaned the drag pad as instructed, and replaced it. I did the same thing with the battery. All screws and the two simple 'plug in' connections for both the drag pad and battery have been replaced smoothly and exactly as I found them. but after putting the back panel on the MacBook, it will not turn on. It will not power up, either by the battery alone, or by using the mains power lead. There is a green light showing on the power lead input, but it is nowhere near as bright as it usually is. So I have gone from having a poorly functioning drag pad, to now having a MacBook Pro which won't even turn on! I have no idea what has happened. Please can anyone help? Thanks.

So are you saying that it will not boot from the OSX installation disk?
It might be worth trying an SMC reset as described here:
http://support.apple.com/kb/HT1411?locale=en_GB

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Try resetting the SMC.
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MacsReh wrote:
I installed leopard on my MacBook Pro 2.0 GHz Intel Core Duo. Well at the end during the restarting phase it took forever to restart and my power was running out so not sure if it restarted or batt went dead.
Welcome to the Apple boards:
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Message was edited by: nerowolfe

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Display Sleep Timer (Minutes): 4
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Portables that will not Power on.
http://support.apple.com/kb/TS1365
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Note: Steps 5 and 6
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http://support.apple.com/kb/HT3964
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https://discussions.apple.com/docs/DOC-2240
The first solution is what you're looking for.

Macbook Pro won't start up after removing and putting back battery

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