Installing or replacing the card reader - ThinkCentre M91 (type 7049, 4473, 4479, 7053, 7136, 4497, 4504, 4517, 7073, 7032) and M91p (type 4468, 4476, 7052, 4495, 7178, 4499, 4513, 4524, 7021, 7034) - Lenovo Support CA