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Monitor says no input signal

I hooked up my Analog VGA cable and turn the computer on. The ICONS come on for less than a second and a message says Analog then no input signal. To make this work do I need to buy a DIGITAL DVI cable and use it?

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  • jamessrh Apr 23, 2009

    I Bought a New Monitor and everything works just fine. Thank you Jim H.

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  • 210 Answers

Do the icons look ok when you can see them? It sounds like your resolution may be way too high for the monitor. It loses sync and blanks the screen rather than show a lot of mess.

Boot your windows in safe mode (tap F8 before it gives you the progress bar.. just keep tapping it until you get a boot menu)

Everything should look big, but the monitor shouldn't cut out. Go to your display properties and set it to the lowest setting. (even if you can't move the slider, just click it once) Then OK and restart.

If that works, you should be in normal Windows with a horrible resolution. Go back to display settings and set it ONE STEP higher. Apply and have a look. If it's good, go another step, and repeat.

Posted on Apr 20, 2009

  • Steve Rand
    Steve Rand Apr 23, 2009

    Oh right? So the monitor was faulty, or did the above work?



    Thanks for the rating!



    -Steve

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No vga input on working monitor


Turned on computer (Pavilion a1657c), HD light operates, Monitor has little window saying:
HDMI Input: No Input Signal
VGA Input: No Input Signal
Recommended Settings: 1920x1080 - 60hz
Changed from the monitor that came with it (HP f2105 digital ouyput) to my Samsung analog and same message comes on dark screen.

Hope It's resolve all Your Computer Problem,
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How to switch from analog to digital mode


Any contemporary monitor is able to switch analog/digital mode automatically if connection from signal source to monitor is set up properly.

Connect digital output from your graphic card to DVI input of the monitor. Disconnect any other signal cables from monitor and switch on both devices (PC & monitor). Wait a while. Monitor checks its inputs and a activates digital DVI, because it is only one active input on it.

If none picture excluding error message of monitor is displayed, go through these steps:
1) Check whether your monitor is set for automatic input selection. If monitor buttons have no response try to use analog input to activate screen (any picture, desktop background...) and then get monitor menu access by pressing menu button.

2) Find out what connector type has your graphics card in PC. Possibilities are: DVI, HDMI, DisplayPort and some their options. See Wikipedia for connector look if you are not sure.
Remember that blue D-SUB (VGA) connectors are analogue and you cannot activate digital mode through analog VGA cable.

3) Use appropriate cable to connect monitor to PC.
Example: Your PC has HDMI output. Use HDMi-to-DVI cable. Your monitor input is DVI and common DVI-DVI cable is not suitable in case you have PC with the HDMI.
Note that DVI-to-DVI, DisplayPort-to-DVI etc. cables are available. You must buy right one.

Be aware that "Auto" button is inactive in digital mode of monitor.

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1 Answer

Monitor stopped working - says No signal


Hi Paul,

This problem is often the result of a loose video cable connection on the computer or an incorrect video signal selection. Most monitors use a cable with "VGA" connector on the end that mates to the computer video port. Other modern computers make use of an HDMI (like the ones used to connect a TV to a BluRay Disk player) or DVI connector instead - either way if it is loose you will get the same "No Signal" message on screen. Make sure these connectors are making good contact with the port on the computer by seating them fully (or better yet - remove and reinsert). In the case of the VGA connector, most have two screws to hold them in the port - you should make sure both are threaded all the way in. You do not need to crank them down, finger-tight is more than enough.

Many newer - flat screen types in particular - do not have the video cable permanently attached. Instead, they use the same cord and connector arrangement found on the computer. It is possible that the connector has become loosened on the monitor end - especially if the monitor is moved / adjusted frequently. You should check the connections at the rear of the monitor just as you checked at the computer, too.

When satisfied that the connections at the computer and monitor are good, check the monitor again. If the message is still present, the monitor may be able to select between an analog input and a digital input via a menu item accessible from the monitor. Check your monitor manual for instructions to change inputs if unsure. If you are using the "standard VGA cable" (the one with the two screws) you should select the analog input. If you're using an HDMI cable, you should select the digital input. If you're using an DVI connector the input may be either analog or digital. When making a change, wait 5 to 10 seconds between toggling between the analog / digital selections to allow the monitor to sync the signal for proper display.

If you're still unable to display the desktop, it is possible that that someone has changed the BIOS options to select a different video card (if more than one is installed) or that the cable is defective.

I hope this helps and good luck!

Dec 17, 2012 | Computers & Internet

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How do I fix the error no vga input signal no dvi input signal monitor going to sleep


Check if you VGA is properly settled in the PCI slot. Try to take it out, clean the slot for dust.
If that doesn't help, it is well possible that you VGA is not working any more.

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Link ASUS laptop to Sharp Aquos LCD TV


No, a DVI to VGA adapter will not work. (The TV is looking for the digital signal from a set top box. This is different from the analog signal on the VGA cable.) You need a converter. Your best bet would be a VGA to component video converter. (I am assuming that the Sharp TV has a component video input.) This page has some examples: http://www.ramelectronics.net/audio-video/video-converters/vga-rgb-hv-to-component-video/c10000-c11200-c11215.html?sorter=productname-en-asc . Note a VGA to component video cable will not work. The VGA to component cables are for projectors that read the RGB signal. The component video signal is YPbPr.

Connect the VGA cable to the converter and the component video cable to the TV and the converter with the computer and TV off. Turn on the TV first and set it to the component video input and then turn on the computer. Then (assuming the VGA port is enabled - adjust in the BIOS if needed) set the computer's video output to the VGA port. (On my Windows 7 laptop, this can be done by right-clicking on the desktop. Choose Graphics Properties and set the display to the external monitor or both. Click Apply and then confirm the change (on the external monitor if using the single monitor). (VGA to Composite video converters also exist if you do not have an available component video input on your TV.)

If your computer is fairly new, you may have an HDMI port. Your TV may be able to read the signal with a DVI to HDMI cable. (It depends on the TV. Not all of them will read the computer's signal on the DVI port. Check the documentation for your model. TVs without a VGA port are less likely to support this feature.)

I hope this helps.

Cindy Wells

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1 Answer

When I turn my computer on, my monitor displays a message of 'vga signal, no vga input signal' and 'dvi signal, no dvi input signal' and 'monitor going to sleep'. My cables are...


The symptoms you described is common in fault mobo or VGA card.But VGA doesn,t turn bad so easy.I suggest to change your mobo first.

If you need more help post back!
Thumbs and testimonial are welcome!

Aug 15, 2011 | HP dx2300 Monitor Personal computer Intel...

1 Answer

My DVI has no signal but my VGA does! what do i do? Please help me!!!


Your HP2009M monitor supports (3) methods of accepting signals from a computer. They are: 1) VGA, 2) DVI and, 3) HDMI.

You would connect the computer to the monitor using one connection only. Generally the VGA is the least desirable as it is an analog signal. The DVI and HDMI method provide digital paths into the monitor and often perform better. Your computer may only offer 1 or 2 connection choices, so you'll have to choose a cable type that is supported by both the computer and the monitor. The HDMI choice will pass audio signals to the the speakers in the monitor without needing to run a second cable between the stereo audio jack of the computer and the audio input jack of the monitor (located next to the HDMI jack) or to a set of external speakers (unless of course you prefer the external speakers).

The message you're seeing is normal. Once the monitor is connected to your computer, there will only be one active selection; VGA, DVI or HDMI. Since you're using the analog VGA jacks and cable, it is expected that you'll see a message that there is no signal present on the DVI (and HDMI) inputs when attempting to view signals on other inputs.

I hope this helps and good luck! Please rate my reply, thank you.

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1 Answer

VGA connection works, DVI does not


Everything seems perfectly normal...

When you connect the computer to the monitor via an analog VGA cable, you get signal on the analog input.
When you connect them via a DVI cable, you feed the monitor's DIGITAL input, so the monitor doesn't get any signal on it's analog input, and informs you about it.
You have to select the digital input from the monitor's On Screen Menu, and then start the computer up - you should see the picture OK.
Also remember to set the display resolution on your computer to match the optimum (native) resolution of your monitor - this will give you optimum picture quality. In case of VA712B it will be 1280x1024.
Good luck and please come back with a testimonial if helped.

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You should have received two cables with the monitor. One is for VGA and plugs into you video card or computer board . The second one is for DVI digidal video and if you have that cable it plugs into the square connector. Then if you look into your monitor manual or quick setup sheet it will tell you how to connect and set the monitor to either VGA or Digital. I'm sure that is what has to be set. Don't hook up both cables to the monitor and computer. Only use the one. Digital gives you a better picture if your computer has that function. Hope this is helpful. Bud

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You need to change the input signal, get into the menu on your monitor and change the signal from rgb to dvi, hdmi or vga dipending on what cable you using for connection.
There is NO rgb connector on that monitor

Good luck

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