Minolta Maxxum 7D, DOA

I bought a Maxxum 7D as I mentioned I might earlier. I decided that while it’s not the latest thing, it’s half the price of a new camera, and I can use my existing lenses. It arrived today. Only one small minor inconsequential detail. None of the buttons beside the LCD screen work. So I have no way to change any settings, review pictures, look at histograms, or basically do anything other than take pictures at 800 ISO. I’m hoping against hope that there is a setting on one of the bazillion switches and dials on the camera that is locking out those buttons, because otherwise I’m going to have to hope like hell that the seller’s “we guarantee against mechanical defects” guarantee actually means something.