On my 02 stock cassette player would lose the display on occasion. If I remember right it shut off completely. Typically it was after hitting a bump. If your's has it the center preset buttons can be removed and what I did was carefully bend the pins out and cleaned the with rubbing alcohol. Also cleaned the pads on back of the preset buttons. Never had any issues after that.
02 Focus LX 114k - auto
04 Escape XLT 132k