No Display of Warning Symbols
 

Hello I have a 2002 Audi A6 Quattro 2.7
just replaced the battery after resurrecting it from the winter the center display no longer runs thru the start up diagnostics like it did before and I haven't replaced the battery in a hell of a long time. Now when I go to toggle to that menu the center screen is blank after the mileage items and such..... its shows the open door and things any ideas?????