Faulty Sony DSC-F717

Some years ago I sent in my DSC-F717 for a replacement of the CCD. When the camera came back, almost all of the buttons got new functions. Both on the lens-part and on the body-part.I was too slow to send it in a second time, but I think I opened it to see if any connector was put in a wrong place. Now I would like to use it again, so I wonder if anyone had similar problems and perhaps a way to solve it.