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Windows 7: Problems With Using Dual Monitors.

21 Apr 2014   #1

Windows 7 Home Premium 64-bit
Problems With Using Dual Monitors.

Hi guys,

First of all, I didn't really know where to put this, so my apologies if I did anything wrong.

I recently found a second monitor just lying around and decided to hook it up to my laptop. It worked fine for about a week but now, after maybe 30 minutes of use the problem occurs;

First of all, both my screens go completely black and the windows error sound plays. After a few seconds my main monitor comes on again and the seconds displays 'No Signal'.
Around 10-20 seconds later, the seconds monitor comes on again, but all the windows have been moved onto my main monitor.
I really don't know what else to say, I'm unsure what the problem is.

Anyway, thanks for any help.


My System SpecsSystem Spec
21 Apr 2014   #2

Windows 7 Professional x64 Sp1

Check your power settings, some laptops on battery power will disable a second monitor automatically. Also, did you try clicking type mobility center in the search programs and files, and choosing the monitor mode you want under display? You can also press the Windows Key + P to open Display Switch.

You can also check your settings against this tutorial here, and see related tutorials there as well:

Display - Change Main Display
My System SpecsSystem Spec
22 Apr 2014   #3

Windows 7 Ultimate Retail Box (64-bit installed) + Service Pack 1

Worked fine for a week under the same exact circumstances?

Never recharged the battery?

If andrew's answer failed, I would have to suspect the external monitor's cable or the monitor electronics.

Check the cable on both ends of the external monitor (see if loose or dirty pins/holes) if seems normal, try replacing it or try the monitor on another system to verify it is fine.
My System SpecsSystem Spec
29 Apr 2014   #4

Windows 7 Home Premium 64-bit

I think it may just be a hardware problem.

Thanks anyway!
My System SpecsSystem Spec

 Problems With Using Dual Monitors.

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