Question about Vizio GV42L 42 in. LCD Television

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Vizio television screen flickers like a strobe light

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Lcd sets use florescent tubes to light the display and, a ballast to power the tubes just like the lights in an office ceiling.
the tubes are called cold cathodes and, the ballasts are called inverter boards. replace your inverter circuit board it connects by wires to the cold cathodes so; isn't hard to find.

Posted on Oct 05, 2009


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Posted on Jan 02, 2017

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SOURCE: I have a vizio 37inch

This is a common fault solution which can be checked and corrected by you assuming that there is no component failure. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

Check for tips to look into the SMPS unit with some of my tips:

Thank you for using Fixya.

Posted on Aug 11, 2011

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SOURCE: a strobe like flashing in

your LCD has a failing backlight bulb. you need to replace it,if you can do it by yourself
try to go to this site
here you can buy some parts that you need.
but its wise to refer to a professional before you do this.
Or if the flashing has a smell. it has a high voltage leak from inverter boards and to the wires going to ccfl backlight bulb.

Posted on Aug 28, 2011

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No matter which input setting is on the screen has a consistent flickering/flashing. Somewhat strobe light-like. What might have happened? Could a power surge have caused this problem? There was a pretty...

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Sounds like you have an LCD tv with backlight problems. Check power board for domed capacitors and replace them. next check connections on the inverter boards. they are on the sides or just one side. Becareful there is high voltage output from these boards. If the cable from inverter board is not good to the screen you can get a strobing. the inverter boards may need replaced. or cales to screen may be bad. The panel also could be bad.

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I've got a 37" LCD made by Vizio. After about twenty min. the screen start to flutter or flicker like a strobe light. Power on the unit stays on while this occures. What cani do to fix this?

I am having the same issue, I think the best solution is to replace the inverter slave and master boards. These are the circuits that controls the backlight and causes the flickering when they are malfuctioning.

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My vizio tv flashes like a strobe light

Sounds like your Backlight Inverter Board is going out, saw one on ebay for about $55 : ) have to get the one for your model tho...

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