Hi, the spacers used in the holes are to offset the curve on the back of the TV. Make sure you are using the proper spacers in the proper holes, the top and bottom are often different sizes. If this doesn't work please reach out to Samsung TV Support at: ― Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri ― LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support We look forward to hearing from you. ^Scott