Question about ViewSonic VA720 17" LCD Flat Panel Monitor

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Help i have a e17t4 monitor and i have pluged it in to 2 computers same thing happens on both comps i pluged the monitor to power i get blue lite then solid greenand stays green i can turn it off and onat this point but when i pluge it in to the computerafter sitting awile it comes on normale and shuts off and you cant turn it back on un less u un plug it for a while and then it will do the same thing

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  • crabguy Mar 11, 2008

    hey thanks bud it was very helpful as i am a very poor man on welfair do to heart i cant aford a new one . i think i fixed it but now lower one third of screen is gone there is a bunch of lines where you can see icons in vertical linesand they move with mouse i did notice a tear in one of the flaps that hang off the side of the lcd screeni think that might be the problem and if so is it fixable or mabe replace the lcd if not expencive lights look good there is some dark brown around one of the parts on the power baord but it looks more like heat done it not shurewhen i put it all back to gether it worked all bit i third on the bottom if its replace able? where ? if known ty for the help



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Hi crabguy,

To my understanding, this is a common problem with some eMachine monitors (including the E17T4) since its production start sometime 2004/5.

Your particular concern could be due to several possibilities:
1. failing backlight - which is more often the inverter going bad therefore failing to supply the CCF Lamps. Additionally, the logic controller senses the "no lamp" condition and shuts the unit OFF. You could try using a flashlight to shine on the lcd front to determine if you have some semblance of your desktop/icons before the unit switches OFF.;
2. video board - which receives signals from the CPU as well as syncs the horz and verti freq. Failure would also sends an OFF trigger to the logic controller and again will shutdown the unit;
3. cold solder and loose connections - the components used are often frail and unfortunately not connected properly and/or the soldered joints are too thin. It would be to your advantage to re-solder most of the soldered joints specially those pins of the power components such as high wattage resistors, filter capacitors, transformers, diodes and regulator transistors/ICs;
4. most of the boards are chassis grounded using part of the trace connected through the holding screws. It would also be to your advantage to tighten the screws holding the boards so as to securely connect the GND trace of the PCBs to the chassis mounting points.
5. additionally, you may want to deep push the different connectors/plugs to their mates/jacks specially the main from the LCD panel itself, it's a bit of a deep-seat type.

Diagnosis and repairs would require familiarity with electronic components and circuitry, use of a DVM and a soldering iron. Should you not be comfortable going this route, perhaps you need to seek the services of a qualified professional.

If taking into consideration the cost of repairs, the down time and length of time to repair the unit, you might want also want to consider just replacing the unit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Mar 11, 2008


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