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No more picture

From 31" picture to 1"vertical picture for 5 sec then no more picture

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  • May 11, 2010

    Make and model of set? Is the screen completely black or showing a thin white horizontal line after the picture went away? Also, is the sound still normal?

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  • 4,234 Answers

Usually this is a problem in teh vertical circuit and generally results in a thin horizontal line through the center of the screen. If that is the case, look for a small flat IC that may be marked LA7837 or someting similar with about 11 pins. This should be the vertical IC. Try resoldering the pins on the IC first. If that fails to resolve the problem, replace the IC. Please note that defective capacitors in the vertical circuit can cause this as well. The more probable defect is the IC. Update this with your results. Also be aware that there are potentially dangerous high voltages inside the set even when unplugged.

Dan

Posted on Dec 17, 2008

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Good Day, checho3435;

Look for fluid on the PCB's or check these items:

This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source). Good Luck, big IRISH>

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hi there, it is worth for fixing it, cheaper than replacing it. you have a vertical section problem. look for a quilified service personnel for it to fix. ty

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1 Answer

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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!

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