LG 55" C9 OLED HDR Smart UHD TV with AI ThinQ OLED

Condition - no marks or scratches, in full working condition, only one thin horizontal line appeared and disappeared Please refer to the detailed technical specifications in the last 3 photos The TV is equipped with all possible features, including smart TV, artificial intelligence, built-in speakers, Wi-Fi, Dolby Vision, Atmos, etc. Everything works perfectly, and the horizontal line rises and falls, as you can see in Figure 6. We have never attempted to fix it, but it could be due to a poor cable connection. The TV has always been mounted on the wall The original remote control is included