battery is ok. car wont turn over. info on dash says unknown driver. on 2000 Buick LeSabre

some gauges working but some aint. no power on radio trunk button door locks some lights on dash working. info button says unknown driver an some info working some is not. no sound at all when trying to start. no starter sound or clicking. seems like maybe a fuse or relay or sensor picking up something. Im hopeing its not the brain. thanks an hopefully u can leed me in right direction.... chuck. first time this happened. car ran good yesturday

I would check for a bad ground. also check battery cables and cable ends.
start simple. if that doesn't work sounds almost like the anti theft. almost seems like it isn't recognizing the chip in your key