For repair quote, I had sent my wine-spilled macbook pro to a local mac shop. This was long time ago and didn't really had a chance to check the system after its returned, since the insurance paid to replace it.

However, since I still have the macbook, I wanted to continue using it.

It works perfectly ok, except it doesn't think there is any battery attached to it, so I have to have the power cord attached at all times.

I've checked the battery on other macbook pro's and it still has the full charge and perfectly in good order.

My guess is, my local mac shop somehow disconnected the battery connector or maybe some other irreplaceable damage on the mother board.

Is there a way to check this?

I do want to open up the macbook, if anything to sharpen my skills at it but I want to find out, what exactly to look for?