As a "last resort" for internal panel faults, small pieces of tape can be used on the ribbon cable connectors to mask specific faulty pins that are causing display issues.
One or multiple vertical lines (red, green, blue, black, or white) running top to bottom. ltf320ap11 panel repair
For technical users, repair typically involves the "cut method" or signal disconnection to isolate faulty gate drivers: Samsung Panel Repair Guide | PDF | Printed Circuit Board As a "last resort" for internal panel faults,
Usually indicates a failure in the gate driver signals (CKV/CKVB) inside the glass. ltf320ap11 panel repair