There are colorful vertical lines on the left side of the screen and colorful horizontal lines on the bottom of the bottom of the screen forming a "L"
Check all connections that goes to panel from T'Con board for any loose connections. Re-seat them once and check. If the fault still persists, contact the authorized service center. T'Con as well as panel should be suspected. If you wish to get some idea about these kind of faults to LCD TVs, check this link. If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock! Instead, contact the nearest service center.
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