How to fix dotted lines on Insignia NS-32D420NA16 screen?
- DDonna JenkinsSep 8, 2025
If dotted lines or stripes appear on your Insignia TV screen, make sure that the antenna or cable TV is connected correctly and securely. The digital channel signal may be low. If you are using an antenna and the signal strength is low, adjust the antenna or use a highly directional outdoor antenna or set-top antenna with a built-in amplifier. Make sure that the video cables are connected correctly and securely to your TV. The video cable(s) you are using may be bad. Try a new set. Other devices may be interfering with your TV. Try turning off one device at a time to determine which device is causing interference. After you have determined which device is causing interference, move it further from the TV to eliminate the interference.










