Windows 7 Not Capable of Dual Monitors?

Hewlett-packard / Cq5300y
December 28, 2014 at 13:44:10
Specs: Windows 7 Home Premium, AMD Sempron LE-1300, 2.30 GHz / 4 GB RAM
Hi, everyone -

I have a strange problem. Here are my machine specs:

Toshiba Satellite P305D laptop with 4GB of RAM, AMD Turion 64 X2 processor (2.10 GHz) running Vista 32-bit on the C: drive. I also have an external VGA monitor connected.

After researching it, I learned the system was capable of running 64-bit Windows 7 Home Premium, so I created a second partition (D:) and did a "custom" install of Windows 7 on that partition to dual boot Vista/Win7. The installation went fine. The first thing I did was the Windows updates... all 123 of them, then rebooted the requisite number of times.

The problem is... Windows 7 isn't detecting the external monitor, even though Device Manager tells me the drivers are up to date. (Both monitors work just fine in Vista.)

Actually... that's not quite correct. It DOES detect the external monitor if I boot into Windows 7 with that monitor plugged in. But then the laptop screen is dark. Plus, when I go to my screen resolution settings to extend the desktop, only one monitor shows up in the drop-down box for "Display".

If I boot into Windows 7 without the external monitor plugged in, the laptop screen will display instead.

Now... I don't know if this has anything to do with it, but I'll just throw it out there. When I'm booted into my Vista installation, I'm using a program called Display Fusion to control my display settings instead of Windows. This shouldn't matter, though, when I'm booted into Windows 7 - right? Windows 7 should still be detecting both monitors, right?

Thanks in advance!

message edited by susanrs


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#1
December 28, 2014 at 14:49:43
Beautifully explained.

"Windows 7 should still be detecting both monitors, right?"
Correct.
Probably a setting in > Multiple displays, needs to be changed.

http://support.microsoft.com/kb/976064
http://windows.microsoft.com/en-au/...
http://www.cnet.com/how-to/how-to-s...


message edited by Johnw


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#2
December 28, 2014 at 15:23:11
Or try pressing Fn + F5 to enable the dual display. You may have to press multiple times.

http://www.mytoshiba.com.au/product...


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#3
December 28, 2014 at 15:57:31
Did you go to Toshiba's web site and download the Windows 7 64 bit drivers for your system? If not then you should. If W7 drivers are not available, then Vista 64bit drivers should work but no guaranty.

You have to be a little bit crazy to keep you from going insane.


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#4
December 29, 2014 at 22:17:16
When you boot directly into windows 7 with no external monitor attached, so your laptop screen is the only one, in the device manager what does it list exactly, under "Display Adapters" "Standard Graphics Adapter or what???

To err is human but to really screw things up, you need a computer!


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#5
January 4, 2015 at 16:12:03
I finally gave up as my TV has a VGA PC Input where I'm also having trouble. It looks like the TV is the problem.. Spent a couple of hours on Toshiba Chat line and they too have decided it must be the TV, so a TV repair man will be out to see if he can solve the problem. Might as well close this link.

Thanks for everyone's interest. Uncle Dewey


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