Question about BenQ FP71E 17" LCD Monitor

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Flickering then off

The monitor flickered then went dark. when i reboot, the BENQ logo on a purple background is visible for a few seconds then the whole screen goes dark

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  • dottybern Jul 28, 2008

    hope you can help

  • Anonymous Aug 31, 2008

    me too



  • Anonymous Sep 21, 2008

    me aswell


  • theforemans Sep 26, 2008

    Help have same problem. Anybody fixed it yet?

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  • 220 Answers

Problem is with Invertor Board maybe defective 2SC5707 transistors.
Samir

Posted on Sep 20, 2008

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1 Answer

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Try connecting it to a different laptop/desktop, to see if the flickering "follows" the monitor. If not, then the video-card in your computer is the problem -- try connecting another monitor to your computer, to see if the flickering still happens.

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The fault could be a faulty inverter or a faulty CCFL lamp.
The inverter supplies high voltage to the CCFL lamp, if faulty the CCFL lamp can flicker or not light up. The CCFL lamp is a mini fluro lamp, and flicks on and off when faulty especially as it ages.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site :-
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You may have a faulty inverter or loose power inverter connection. OR
You may have a defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
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1 Answer

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have you tested it for gone conponments

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Seems either aproblem with Invertor board or Front panel switches are leaky.
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it sounds like a blown cap.. you can replace it if you know how to soder

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If you have some electrical equipments like CVT, UPS near to your monitor, please put them away. If the flickering is due to the maganetic interfearence then it will solve your flickering of screen. and even after this if you are not able to use your monitor buttun then please call your technical expert b.coz your monitor may got some physical problem.


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1 Answer

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i Have the same problem, this screen is used on the spare computer we have in a loft conversion and the room does get rather cold, Warming the screen up with a fan heater for a couple of minutes gets rid of the problem. When the fault occurs the buttons on the front to adjust the picture quality don't work they just turn off the monitor.

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I would bet it is the cable or connection. Have you tried connecting the monitor to a different PC?

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