Common problem, faulty LED boards.
The only solution that I have heard of is to have the board replaced. An attorney on another Forum (Roadfly) has been sucessful at getting BMW to pay for the replacement part as a minimum, sometimes even labor. Good luck.
E39 - 1998 540iA Sport (11/97 Production)
E30 - 1989 M3 (44k miles)
1979 Triumph TR7, still have my first car ;-)
E21 - 1980 320i (sold at 130k)
E23 - 1986 735i
I am a BMW Car Club of America member, are you? <a href='http://www.bmwcca.org/' target='_blank'>http://www.bmwcca.org/</a>
<img src='http://members.roadfly.com/kowached/bmwcca1.gif' border='0' alt='user posted image'>