Question about ViewSonic VA702b 17" LCD Monitor

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Monitor will not come on but power light comes on

When I power up the monitor without any input signal the flourescent tubes will come on and go off in a split second is this normal if not what board do you think is at fault. Video or power supply. Thanks

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  • steve380 Jul 27, 2009

    The light goes green on start up then amber in about10-15 seconds and stays amber. The screen starts displaying and then goes off at the same time the light goes amber. Thanks

  • Mark Woelfel May 11, 2010

    Do the lights completely turn off or do they go amber instead of green?

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  • 159 Answers

Based on the numbers of viewsonics I have repaired, It is probably in the power - inverter board and not in the video board.
Since it is a 17 inch, there is also a chance that one of the bulbs is bad, but that is less likely.
If you can take it apart and send me a picture of the board to bammbamm@ptd.net, I may be able to see if the board has the obvious problems.

Posted on Jul 21, 2009

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Isolate the problem per above. Eliminate the monitor, split cable and software settings so that each, individually work. Then eliminate team board - do you have a spare?
It could mean sharing the monitor signal means weakens it so that one can display and the other does not work. Prove it with a different source computer. Don't know if buffer devices exist or how to increase input sensitivity.

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Check the small signal boards solder connections. The small signal board is the large green circuit board on the right when looking in the rear ( Has all the inputs on it ) Famous for solder issues on the ITC222 small signal boards.slinteriors_22.jpg

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You should see a slider at the bottem left of the screen to adjust the resolution, and a drop down bar on the other side for the bit rate. This should solve the problem, also you could open the scond screen also in the display properties, and drag what you need to see on the screen to that screen, you will know what i mean when you open screen 2 it just expands the desktop. hope this helps.

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While trying to change channels, my t.v. displayed ''no signal'' and then shut itself off. Now, when I turn it on, it says no signal and turns itself off after a few seconds.


Turn the television on and as soon as the screen turns on repeatily press the input button or change the input to whatever input you are using from a source device. As long as you change it to anything other than RGB.

Your television is essentially a big computer monitor with multiple inputs and a tuner. When using your computer and shutting it down the monitor will go in a power save mode. You don't need to shut off your monitor due to this power saving mode. When you power up your computer your monitor automatically turn on.

With the VIZIO and the RGB (computer) input the television will act just like a computer monitor. When you have a computer connected it will power down automatically when you shut off your computer. When you turn your computer on the VIZIO will automatically come out of standby mode. This is through RGB only.

This is normal operation for the VIZIO but can see confusing when nothing is connected to the RGB input. If you change your television input to RGB it will sense no signal on the input and will go into standby mode after about 5 - 10 seconds. If you were to send a signal to the television through RGB it would automatically kick on.

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Alicia, Your monitor digital board is OK. The problem is with the power supply/ Inverter board(s) in back of the LCD/LPD Panel that you look at. You will need to question Gateway to see if they have a swapout program where you send them $30-$60 and your old monitor, and they will send you a refurbished (new cold cathode fluorescent tubes w/inverter board installed ) complete monitor. I'll tell you one thing though. Alicia, Don't feel bad abt this monitor of your's failing. You have joined the club with over 2000 others whose CCF tubes and INVERTER boards have with time now fail to light-up their LCD panels. Yes, there are some companys that do repair of these monitors. Try surfing under CCF tubes or FPD repair, or LCD repair. Yes Alicia, you are dealing with a technology similar to the new type of screw-in light bulbs, only the tubes are thinner and laid flat horizontally across the rear of your LCD panel with a reflecting mirror in back of them. Good luck girl in getting it repaired. I'm louie12fix on fixya or lmistyrel @aol .com North of Chicago 40 miles

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This is a problem I have seen with a few LG monitors.
Your Inverter circuit is fine (that powers the lights to your screen so you can see the image on the LCD panel) but the monitor does not like having a video signal attached to it.

  1. Bad capacitors on the power board can upset the current going to the controller board. This board included the video input circuit and the power supply needs to be stable for this to operate.
  2. The controller IC that translates the video signal into what the LCD panel controller can understand is failing. Normally this fault occurs in the horizontal and vertical input of the IC. The fact you can see the other message on screen is due to it going through it's own internal and seperate section of the IC. In this case the only repair option is to replace the internal video board. Sony will not supply the parts directly to the public, but if you are really nice, they "may" tell you where to get one externally to Sony.
Hope that helps =)

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Lower your resolution on your computer. Usually when that happens the resolution is set higher than what the monitor can support. Lower the resolution and try again.

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