Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Two Monitors in One Computer Not Extending

21 Nov 2011   #1

Windows 7 Professional
Two Monitors in One Computer Not Extending

Windows 7 Professional
Sevice Pack 1

Intel Core i5 CPU 760 @ 2.80GHz

64-bit Operating System

NVIDIA GeForce GT 430

I have two identical monitors that I would like to connect to my computer. I have only one graphic card and I am using a vga splitter cable. Both monitors display but they are mirroring each other, which I don't want. I tried a splitter to connect both monitors. Also:

Two monitors in one VGA with one splitter
Two monitors with one VGA and one DVI
Two monitors in one VGA with one splitter and one DVI on second monitor.

I used NVidia Control panel and tried different settings but, did not work.
I also tried right click on desktop then Screen Resolution but, did not work.
I windows logo + P but, it did not work.

Please help. I believe my graphic can support two monitors. Not 100% sure but, I thik it supports it.

NVIDIA detects:
Dell 1900FP
Dell 1907FP

Windows 7 detects:
Display > Screen Resolution

1. Dell 1907FP (Digital)
2. Genric Non-PnP Monitor

It previously detected Multiple munitor 1|2

If I click on IDENTIFY it shows 2 on both monitors.

If I click Windows logo + P and click on Extend then both monitors will be blank. I think all displays way to the left. Not visible to me.

Please help.

My System SpecsSystem Spec
21 Nov 2011   #2
Microsoft MVP

Win 7 Ultimate x64

ralf206 welcome to the Seven Forums.

A VGA splitter will do nothing but mirror/clone each, you need to use VGA and DVI (assuming your card is one that has both, which some do, where others have two DVI ports) to be able to use extended mode. Using the DVI port shouldn't be a problem as those monitors have both a DVI and VGA port on them,

My System SpecsSystem Spec
21 Nov 2011   #3

Windows 7 Professional

Thank you. It is fixed already. I just connected one VGA and one DVI then right click on the desktop for SCREEN RESOLUTION. I switch the monitors around and made monitor 1 as main monitor. Click on DETECT on both monitors. Then turn off both monitors. That fixed it.

Thank you!
My System SpecsSystem Spec


 Two Monitors in One Computer Not Extending

Thread Tools

Similar help and support threads
Thread Forum
Extending Desktop to Three Monitors
I have a PCIe video card that can accommodate two monitors, the idea is to extend the Desktop to three monitors.. Can this be simple done by adding a new video card that accommodate one monitor? or should the three monitors be connected to one video card that has three outputs? Built in graphics...
Hardware & Devices
Computer turning off / not outputting to monitors - BSOD 0x00000124
Hello all, about a month ago I had a coworker tell me that his computer was either randomly turning off completely, or the computer stays running but stops outputting to his two monitors and their LEDs go from green to amber. When the computer stops outputting to the monitors he has to press the...
BSOD Help and Support
Crashing every night while computer / monitors are asleep.
I started crashing a few months ago. It always happens at night while I'm asleep. The crash dump files point to atikmdag.sys and ntkrnlmp.exe. I even reinstalled windows but the problem still persists. I ran the SF Diagnostic Tool and have attached the results of that to this post.
BSOD Help and Support
Computer believes 2 monitors are connected when only 1 is
I have recently bought a new computer, so I took my SSD and all of my HDD's out of my old PC and put them in the new one, although i decided that i would like to use my old setup to learn how to overclock. (the computer was going to get thrown out so if i destroy it it doesn't really matter) I was...
Graphic Cards
Extending or showing desktop on more then 2 monitors.
Is it possible? Here are my specs. I want to output on both HDMI and VGA HP dv7-2078ca PC Specifications Hardware Product Name
Graphic Cards

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:05.
Twitter Facebook Google+