Question about ViewSonic VX2025wm 20.1" LCD Monitor

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DVI input on monitor not working

Hi, I recently unplugged my monitor from my main machine (using the DVI) to use on another computer (using VGA). When I returned the monitor to my main computer and connected it using the DVI cable, the monitor was not receiving any signal. Now I can only get the monitor to work with the VGA cables. I have tried several DVI cables and they all do not work (even though they work with other monitors). Everything works fine with VGA cables on multiple computers and not at all with DVI cables on multiple computers. I figure that I must have messed something up with the DVI input on the monitor when I was plugging in the cables or something. Anyway, I was wondering if this is a fixable problem. Thanks!

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Re: DVI input on monitor not working

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.

Posted on Nov 26, 2007

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Re: DVI input on monitor not working

Try to reinstall the display card driver . Reboot your system.

Posted on Apr 19, 2008

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Re: DVI input on monitor not working

Buy a DVI to VGA connector or cable.

Posted on Dec 02, 2009

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What is the best way to connect 2 computers to this monitor

If you have two separate computers for different purposes, such as personal and work use, you may find it convenient and necessary to connect both to a single monitor. Many monitors have dual inputs, making such a connection simple. However, you might need a keyboard, video and monitor switch to accomplish this task if the monitor lacks a second input. Dual Inputs
Step 1 Examine the back of your monitor for the presence of dual video inputs, such as a single VGA and DVI or HDMI output.
Step 2 Connect the VGA cable to one computer. Plug the other end of the cable to the matching input on the monitor. Rotate the retaining screws until tight at both ends of the cable.
Step 3 Plug the DVI or HDMI cable into the back of the second computer. Insert the other end into the monitor's digital video input. Screw down the retaining screws if you're using DVI.
Using a KVM Switch
Step 1 Ensure both computers are turned off. Place the KVM switch on your desk where it is within convenient reach.
Step 2 Locate the video output port on the back of the KVM switch. Plug a VGA cable into this port. Plug the other end of the VGA cable into the monitor.
Step 3 Plug the VGA monitor outputs from each computer into the inputs on the back of the KVM switch. Tighten the retaining screws down for each connected VGA cable on the computers and the KVM switch.
Step 4 Plug the keyboard and mouse cables into their respective outputs on the KVM switch. Plug each set of keyboard and mouse cables from their ports on each computer into the matching inputs on the KVM switch. Plug each cable in sequentially to avoid mixing them up between machines.
Step 5 Double-check that the mouse, keyboard and monitor cables leading from each computer all correspond to the right machine. Plug the KVM switch's power cord into a nearby AC outlet or power strip.
Step 6 Turn the computers and monitor on to verify the connections are correct.

Required Items

  • VGA cable
  • DVI or HDMI cable
  • KVM switch
  • Power strip (optional)

Jun 13, 2014 | Acer 22" X223w LCD Monitor

1 Answer

My acer monitor H243H says No Signal after I unplugged the DVI cable and plugged it back in. I can't switch the input because nothing happens when I push the input button on the bottom of the monitor. It...

Maybe your BIOS switched to VGA output, try plugging in another monitor which has VGA input and change settings in BIOS for default output to DVI.

Nov 05, 2013 | Acer H243H Monitor

2 Answers

I have an AOC 22+ it is just a little over a year old (just out of warrantee) When you turn on the monitor and boot the computer the monitor will go thru its start up showing the AOC logo then it goes...

unfortunatly i believe the monitor may be dead. also check the connection on the monitor itself (the cable) some of these monitors are picky about which port is active dvi or vga there should be an option to change the input on the monitor itself from vga to dvi for the connection i hope that helps let me know!

Mar 14, 2011 | AOC V22 22" Monitor

1 Answer

Connectivity card from montior to CPU is different than other PCs, in back side of the monitor its showing to type VGA and other one DVi connector, In my CPU i dont have the slot for the DVi connector,...

DVI ==> Digital Video Input
If your monitor has both DVI and VGA inputs,
and your PC's video-card has both DVI and VGA outputs,
then buy a DVI-to-DVI cable, and use it, for a better picture.
If your monitor has both DVI and VGA inputs,
and your PC's video-card only has VGA output,
then use a VGA-to-VGA cable.
Or, purchase a video-card with DVI output,
to replace the video-card with VGA output,
and then use a DVI-to-DVI cable.

Feb 21, 2011 | Acer X193W LCD Monitor

1 Answer


If the computer hangs for a while and reoots and then works the monitor, it tells me that the signal to the monitor went dead until rebooting. It is as if you unplugged the monitor from the vga or dvi card, or it was getting an incorrect signal from the vga or dvi card. It may not be the monitor, so much as it is the computer doing this to the good monitor.
One can test to see if the monitor is bad by using it on another computer tower or desktop to see if it does it there. Good luck on this diagnosis.

Feb 03, 2011 | E-Machines 17" Widescreen Flat Panel LCD...

1 Answer

My hp monitor flashes no dvi imput signal

First, make sure the dvi cable is hooked properly to the computer and that the computer's VGA card's dvi output is set to work in the monitor's advance options.

Has this computer/monitor combinatioin ever worked before? Or did the message appear after successful operation of dvi to the monitor?

Perhaps, try to use a vga cable to the lcd monitor to see if that input works.

Good luck on this repair.

Jan 28, 2011 | HP w1907 LCD Monitor

2 Answers

Samsung syncmaster 2033sw monitor, till now i was using a vga cable for the display, but recently i bought a dvi cable and connected it. but its not detecting the display of dvi cable. if i remove the vga...

LCD Monitors having multiple inputs have option and option to select and switch between the displays from analog (VGA) or Digital (DVI) inputs. Go to the LCD menu and select input source (DVI)

Hope this helps!


Nov 15, 2010 | Samsung Syncmaster 2033SW Monitor

1 Answer to attach this to dvi desktop

Does your computer's video-card have a DVI-output socket?
Does your LCD monitor have a DVI-input socket?
If 'yes' to both, then you need a DVI-to-DVI cable.

Does your computer's video-card have a DVI-output socket?
Does your LCD monitor have a VGA-input socket?
If 'yes' to both, then you need a DVI-to-VGA adapter,
and a VGA-to-VGA cable.

Oct 23, 2010 | ViewSonic VG900b 19" LCD Monitor

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

Dvi to vga

You will not benefit from the DVI input unless you have DVI output on your computer. The great advantage of DVI is that the picture is transferred in digital form all the way from your computer to the individual pixels on the monitor. If you only have VGA output on your computer then you will never get a better picture than by using a good quality VGA cable to link that to the VGA input on your monitor.

The DVI plug is designed to carry both digital and analogue (VGA) signals on the various pins, so "adaptors" exist to allow a VGA monitor to attach to a DVI output on a computer. Monitors may also support VGA input from their corresponding DVI input sockets, but the picture quality will never be better than by using a good VGA cable because it is still not using the digital capability of the DVI interface. What's more, because you may need more adaptors and thinner conductors in the cable, you will probably achieve a marginally poorer picture than with VGA to VGA.

When you next buy a PC or a new video card, get one with DVI to take advantage of your new monitor. In the meantime, your best bet is a quality VGA to VGA link.

Sorry that's not what you were wanting to hear, but I hope it will help you avoid further frustration.

Sep 20, 2008 | Envision EN-985e Monitor

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