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The t con board or LCD panel of the tv is faulty. Can confirm by replacing the t con board. If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/
Hi I had the same problem. Broken white lines across the top of the screen. This is called overscan. You need to go into the Setup menu, other settings. 16:9 overscan needs to be on. Hope this helps.It solved our problem.
The problem turned out to be caused by a poor solder joint on R530. This is in the HV sensing circuit and is associated with IC501/ comparator. The resistor was replaced for good measure and proper operation restored.
this symptom, sometimes called the tube light effect, it is characterised by a bright thin horizontal line across the middle of the screen. this symptom is caused by a breakdown in the vertical deflection circuit. hence maybe the trouble maybe in the vertical oscillator, amplifier or output circuits. but if all i have said is not clear to you, better bring it to a qualified tv technician. good luck!
Will try that suggestion and report back results. Thanks.
If I switch my tv on