Ok, guys, this message just came up on my Optoma HD142X Projector (602 hrs.) and I need your help. This might sound stupid to some of you, but I must confess I need your help. I've been trying to follow the steps on the Owner's Manual (page 40 to be exact) and I can't figure out how to do it. I can't even see/locate the filter through the vents. Has anyone here done this? Is there a tutorial or video? I will greatly appreciate any help from you!!!