Excellent guide, worked like a charm. I too disconnected the LCD cable from the LCD end, much easier. When replacing the thermal sensor, make sure the flat side (with the label on it) and not the rounded side faces down against the drive before you replace the bracket and tape. Also, helps to have a good clean microfiber cloth and can of compressed air on hand. I used the air to clean the insides as best I could, but it really helped with cleaning the LCD before replacing the glass panel. The replacement kicked up a ton of dust onto the LCD that I only noticed with a flashlight, so I alternated cloth and canned air to get it as dust free as possible before replacing the panel. There were streaks under the glass panel I never knew existed, and now my display is brighter now than ever before. My old iMac has a new lease on life, and a week later is running strong. Thanks, iFixit!