Question about ViewSonic VG900 19" Flat Panel LCD Monitor

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VG910s not recognizing DVI input

Hi I have a ViewSonic VG 910s, which I was using connected to a Macbook Pro via DVI. A week ago, a connected them (as usual) an the monitor didn?t respond. It is just black, and if I turn it off and on the ?no signal? sign appears. The monitor is working nicely via the VGA input (which BTW connects to the DVI adaptor of the MAC) with no problem. Any ideas on which could be the problem with the DVI? Thanks

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Re: VG910s not recognizing DVI input

Graphics card need setting to DVI out put Check your manual

Posted on May 17, 2007

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Make sure the resolution signal sent out via the DVI is a valid timing signal the monitor can recognize.

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that problem is very common on a viewsonic tv replace the power supplyboard.

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you are unable to get an image on your ViewSonic monitor, first check that the necessary cables are attached correctly and that the proper drivers are installed. ViewSonic offers drivers for download directly through its website (see Resources).

Some LCD monitors use a VGA input while others take advantage of the newer DVI interface to provide a connection to PCs (some ViewSonic monitors offer both types). When connecting your monitor for the first time, you'll need the right type of cable for both your monitor and computer. In some cases an adapter may be necessary to convert the DVI signal from your monitor to work in a VGA input on your PC.

Check that the VGA or DVI cable is tightly attached to the back of your monitor and to the back of your PC. Use the small thumb screws on the ends of the connectors to keep everything tightened in place, which will prevent the cable from getting loose.

ViewSonic monitors also use a power cable to plug into a power source. If the power light does not comes on, check that the power cable is inserted fully into the back of the monitor and that it is plugged into a working wall outlet or a reliable surge protector.

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1 Answer

My viewsonic mo9nitor says analog not digital on

To clarify, you know that analog is referring to the VGA 15 pin video input, and digital is referring to the DVI video input, right? You can't have the digital video unless you use the DVI input, which requires a DVI output from your computer (and a DVI cord of course).
If you already knew this and you mean that it won't switch over to your DVI, then there could be several problems. Most of them being with your DVI signal source (computer). Try booting the PC with ONLY the DVI cord attached between the PC and the monitor. If you have a VGA cord plugged into either, UNPLUG IT FROM BOTH ENDS.

Dec 05, 2009 | ViewSonic Computer Monitors

1 Answer

I need help setting up the DVI input.


There are two ways to do this.

First and simplest is to simply shutdown the pc, disconnect the analog from the back of your PC and connect the DVI cable to the PC and monitor. When you turn it back on the PC will detect and switch to the DVI.

Second, and better to compare. Connect both sets of cables and go into your display settings, then select advanced options. You should see a GeForce tab in the advanced menu. On that tab there is a multi monitor display setup. Set it to mirror to both screens and apply.

Once it's set switching inputs on the monitor SHOULD work. The problem that makes it a "should" is that both the monitor and the video card have the ablility to sense a connection. So, even with mirroring setup you may have to use the first method as you can't have both connected and operational at the same time.

Give these a try, if you're not sure how to get into the display settings, comment back here with your windows version and I will give you a step by step


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Can I use an Apple M7649 Studio Display with a MacBook Pro

Do you have the black unibody Macbook Pro that was just released, or the silver model?

Since the display is DVI, it will directly hook up to the silver model. If you have the new model, you need a mini DVI to DVI adapter.

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I had the same problem, you must call Viewsonic to change your screen. The DVI input on the screen is dead.

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You must focus to mainboard of LCD monitor find the voltage regulator IC. Voltage test the regulator IC use digital or analog multimeter range 10v dc connect the negative to cold ground, these regulator providing a constant supply of 2.5 - 5v to all IC in the mainboard. check the scalar IC. Because scalar IC will convert analog input signal of Red, Green & Blue. Lastly check the controller board, check the ribbon cable connector from mainboard to
controller board for lose, check the fuse inside controller. I think the exact problem of your monitor could be either the (mainboard) or (LCD panel where the controller board is located).

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Contacted viewsonic about this issue- they suggested- have both dvi and vga hooked up to same machine. start with poweroff on both. power on monitor, then power on computer. when you see display coming from the vga, power off pc, then disconnect vga cable, turn off power to monitor, disconnect power cord from monitor for 5 + seconds, reconnect power cord, power on monitor, then power on pc.
If this doesn't work to get the dvi working, (as happened to us) we returned our monitor for a replacement, since it was still under warranty.

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