a liquid crystal display having a working and a redundant shift register for driving the gate lines of the display . a plurality of repair lines rl 1 - rln run in parallel with the plurality of gate lines gl 1 - gln between the working shift register whose stages are arranged to one side of the display and the redundant shift register whose stages are arranged on the opposite side of the display . initially the repair lines are not connected to either of the shift registers and the gate lines are only connected to the outputs of the working shift register . both the working and the redundant shift register are connected to receive the same input driving signals . when a defect is discovered in the working shift register , a laser beam is used to disconnect the output of the defective shift register stage from its gate line . a laser beam is then used to connect end of the repair line to receive the input signal for the defective stage and connect the other end of the repair line to deliver the input signal to the input terminal of the corresponding stage of the redundant shift register . the output terminal of the corresponding stage of the redundant shift register is connected to normally unconnected end of the gate line from the defective stage so as to deliver output to the stage of working register following the defective stage .