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The Chamberlain Group, Inc. Fasten the manual near the garage door after installation. . opener, instructions will call for hand tools as 41AB050-2. Get LiftMaster, Chamberlain and myQ support. Chamberlain Group has helpful how-to articles, troubleshooting resources, video instructions, product manualsPlease read this manual and the enclosed safety materials carefully! ? Fasten the manual near the garage door after installation. ? The door WILL NOT CLOSE Additional setup and instructions for using the printer: User's Guide and Quick Reference Guide—The guides are Lexmark CS310n and CS310dn. Please read this manual and the enclosed safety materials carefully! ? Fasten the manual near the garage door after installation. ? The door WILL NOT CLOSE