A:Answer Thank you for your interest in the LG LG UHD 70 Series 75 inch Class 4K Smart UHD TV (74.5'' Diag) (75UP7070PUD) model. Yes, a 75-inch LG TV with horizontal lines on the screen can be repaired. Horizontal lines on the screen can be caused by various factors, including issues with the HDMI or signal cables, the T-Con panel, or the gate drivers on the panel. You can download its owner's manual through this link for more information: https://www.lg.com/us/support/product/lg-75UP7070PUD.AUS. ^Cris