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I have an hp a706n desktop with 3 vga ports. Until yesterday I have been able to use two monitors. Now only one of the vga ports work. The port will work with ether monitor. However when I connect my hp monitor to another port I get a warning that it is going into sleep mode. When my two monitors are disconnected I get a warning that they are not connected to a vga port. Once I connect to any vga port that warning diappears but there is nothing on the screen except for the one connected to the one good port that is working.

Posted by Tom Halbert on

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Anonymous

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Getting dual monitors to work correctly seems to be a hit or miss affair. In many cases, it's just a matter adding a second video card and monitor and rebooting the computer. In other cases, you need to do some cyber gymnastics to get things working correctly.
The process is the same no matter which version of Windows you are using. First, be sure that your system is working correctly. Boot into safe mode and verify that you have only one video adapter and monitor showing in the Device Manager. If there are more, but you only have one adapter and monitor, you'll need to remove the extras.
Once you're sure that your video setup is working fine, turn off the system and look inside. Remember that you'll need a video card for each monitor that you plan to run under Windows. That means that your system must have a free expansion slot for each one. You may find that you have problems with IRQ sharing or DMA channels, depending on your motherboard and video card, although many video cards seem relatively intolerant of IRQ and DMA conflicts. Install your video card in the appropriate slot, and then connect the monitor.
Restart your system. If all goes well, your computer will boot the same way that it always has…the second monitor will still be dark. If your system prompts you to login, do it. You may need to install drivers for your second video card, depending upon whether or not Windows has built in drivers or not. Just follow the on-screen instructions.
Once the drivers are installed, check the Device Manager to make sure that the display adapter is properly detected:
I have an hp a706n - e14df7f.gif Once the drivers are installed, open the Display Properties window. In the settings screen, you should see something like this:

838d51e.gif You'll see that a second display is shown. Click on the grayed out display marked as "2". The window will change slightly to look like this:

You can then change the desktop resolution and color depth. Once you've done that, click your mouse on the "Extend my Windows desktop onto this monitor" to enable it. Remember that the resolution, color depth and refresh rates of each monitor adapter combination don't have to be the same. The window should look something likI have an hp a706n - ad5a047.gif
ad5a047.gif Click on OK and your second monitor should activate itself as an I have an hp a706n - cf82475.giff the first:

cf82475.gif 82671cc.gif
You'll find that you can change the relative geometries of the two monitors by moving their respective boxes around in the Settings window.

Please reply to me if that doesnt help!!!

Posted on Mar 27, 2009

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I see that you are having a check input error on the Monitor/LCD that your are connecting to your Dell tower, please see steps below.

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wow no OS stated, nor model of Lenovo.... (so generic answers)
i guess you have no manuals on any of this. right>?
is this HP question, if the HP monitor works on other PC its ok.
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leaving what, LENOVO.!! (unnamed? a stinkpad?)
this is a HP forum, so cant tell the hot key for External VGA
on any Lenovo. but you can RTM the book on it. easy.

that HP VGA monitor message means.
1 thing, the 3 video and 2 sync lines are dead.
in non geek means the VIDEO CABLE IS DEAD.
try running the PC in F8 mode this puts WINDOWS< (is it./)
in to LOW RES mode (poor) and all monitors work there.
all. (last 25 years)
if still dead, you need to use the hot key to turn on VGA, on all laptops
my HP laptop as 3 modes, VGA on , VGA off and AUTO.
nice no? that AUTO.'
The PnP wakes up the port. is that magic.

The VGA port must work, and the LCD both.


is this one of those beasts called an all-inone desk top
than name you used tells the helper nothing
as that name used for many form factors.
all in one
regular desk tops.
and more.even pocket pc.
now idea at all what you have (hp is clear on that end=)
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Won't load windows...

hi Lus;
What color do you have on the power button of your monitor? Check the VGA port at the back of your computer, how many VGA ports do you have? if you have 2, try the other port instead,

here is a VGA port:
http://www.google.com.ph/search?hl=en&q=VGA+port&btnG=Search&meta=
hope you see the images,

ill wait for your feedback
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