Macbook won't power on with battery

[bargsbeer]

Just picked up a 2.4Ghz Macbook, The machine is immaculate The only issue is for some reason it won't stay on when the battery is in the machine, Runs perfectly fine without the battery, The battery is good (tested in another Machine)

I'm guessing it's a logic board problem.

Any ideas?

[6string]

Did you try SMC reset Intel-based Macs: Resetting the System Management Controller (SMC) ?

[bargsbeer]

Tried that, no luck.

[6string]

How (where) did you pick up this MB?

[bargsbeer]

I bought it locally, I knew it had the problem when I got it. I got it real cheap,luckily.

[6string]

Is the sleep sensor working?
The reason I ask, is that it could be this is either faulty, dirty, or loose !?!