Vertical Problem,Screen Distortion at Top

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Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

You have bad capacitors and possibly a vertical IC that is going bad. And check for bad grounds in and around the IC and caps!

as a general rule, vertical faults can be divided into two types: ones that cause geometric distortion (a circle will not be round) and those that simply black out a portion of the screen. the former are faults in the vertical oscillator, drive, or output stages. the latter are blanking faults. blanking faults are almost always caused by electrolytic capacitors changing value and thereby changing the timing of the pulses which blank the screen during vertical retrace. In other words, the pulses are turning off the video signals at the wrong time. the most common true vertical fault is geometric distortion and a foldover of white lines at the top of the screen. this is almost always caused by the electrolytic capacitor on or near the collector of the vertical output transistor or part of the IC which has the supply voltage (B+) on it. In the old tube days, the general rule was that bottom distortion was in the cathode of the output tube and distortion at the top was caused by a fault in the drive circuit. this may help the solution!!

Try moving a medium powered magnet (not one for picking up heavy objects and not a refrigerator holding one) over the distorted area. If that doesn't work, try a more powerful one. This worked for my Toshiba LCD. Good luck!

you might have bad caps or the vertical output integrated circuit, try to locate the vertical ic and check the surrounding areas for bad capacitors.


good luck


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You are probably in the "3:2" ratio print setting. This is accessed through the "F" button, under image quality. The 3:2 is a ratio of height to width which corresponds to a 4x6 inch print. The other settings are approx. 4x5.33 inches in h to w ratio. Just change the quality setting to the larger megapixel settings and the bars will disappear.

Is it a clean vertical line or a fuzzy vertical line? It could be as simple as a cleaning.

Check for leaky capacitors in the vertical section of the TV or cold solder joints.
I would also check in the power supply.
Good Luck.

This is due to vertical section failure. Change the vertical supply rectifier diode and supply filters. Then check zener diode leakage in pumpup circuit section. Also check any electrolytic capacitors leakage in vertical section. If it is old model tv change vertical height, vertical lenearity presets also. I hope given details useful to you.