1, the sessions may be out of sync, so use the function keys of the remote control to adjust to the setting bar-fine adjustment, OK, manual fine adjustment, and adjust to the best effect. Fine-tune the old TV.

2. There may be a problem with the field synchronous circuit or synchronous separation circuit on the internal circuit board, so it should be repaired.

3. Maybe the quality of TV video signal is not good. Reconnect the line.

4. It may be caused by unstable power supply voltage. Try buying a power regulator.

5. It may be disturbed by the external environment. Try another location or room.

6. Maybe the video standard of the TV is wrong, or there is something wrong with the video standard circuit inside the TV, so it is reset or sent for repair.