MacBook wont turn on with the built-in keyboard,turns off immediately

Hello,

first sorry for my english,

when i start my MacBook mid 2010 white unibody it turns off immediately. I tried several things than I found this:

MacBook wont turn on, will display green adapter light/orange charging

So I disconnect the built-in keyboard and "jumped" the two contacts on the logic board and it starts without problems. When I connect the keyboard again, the Macbook turns off immediately.

Now it works with a wireless keyboard but if it turns off for some reason i have to open it and do the same procedure again.

What do you think?

Thanks for any help.