My 2000 S40 just recently started doing this. Every time I start it, the clock and trip odometer reset and the radio, as well as the antenna, do not turn on at all. The antenna is the hidden, telescoping one, so it makes sense that if the radio isn't working, it won't even go up. Everything else electrical works fine, I did a battery check and everything read fine, no fuses that I could see were blown but this happens every time it starts. And on a couple occasions, the open door light comes on when there is definitely not a door open. Anyone have similar experiences or know what the problem might be?