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: Main display goes black when I connect VGA secondary monitor

17 Apr 2011   #11
Mike Connor

Several, including Windows 7 x64 Ultimate

Good to hear you got it sorted out. My bad really, I should have asked if you had tried just switching the machine on and off. Some relatively simple stuff can be quite confounding.

Regards....Mike Connor

My System SpecsSystem Spec
17 Nov 2012   #12

windows 7 home 64 bit
Connecting LCD TV to laptop, screen goes black

VGA from computer to HDMI converter, HDMI cable from converter to TV.
Set "connect to projector", to illuminate both displays. When hooking up the VGA to the laptop the screen would go black.

Solution: Unplug the HDMI converter, TV off. Hook up VGA cable to computer and converter. Hold down the windows key, strike the P key, select the display option you desire, Power up the TV and the converter. Should be operating as desired.

Previously when hooking up the VGA cable the computer screen would go black. To get the screen on again I disconnected the VGA cable. By shutting down the converter before cabling up seems to have corrrected the problem. Apparently cabling up HOT is a no no! For me, all similar video hooking up will be done cold.
My System SpecsSystem Spec

 Main display goes black when I connect VGA secondary monitor

Thread Tools

Similar help and support threads
Thread Forum
Upgraded main HDD and now a secondary HDD is showing Unallocated
Windows 7 Ultimate 64-bit As the title says... I tend to upgrade my Main C Drive which currently is a 256GB Samsung SSD 840 Series once every 6-12 months or so for performance as the price of SSD's come down. I have 3 other HDD's in my computer that always stay the same and are all WD 1TB (D,...
Hardware & Devices
Permanent black bar on bottom of secondary monitor
I installed DisplayFusion for my dual-monitor setup, but decided to uninstall it soon after. Upon uninstalling I noticed a permanent black band/bar across the bottom of my screen. I can access (right click and get a context menu, etc.) the screen space under the band, but it completely hides...
Hardware & Devices
Secondary display goes black when playing a game.
Hello. I have a laptop. I got a monitor that I use as secondary display. I use that monitor for tv shows while playing on primary, or that was the plan. When I start gta san andreas, the second screen goes black. But it's only the video. If I take VLC out of full screen, I can see the...
How do I access my main monitor if broken in a multi-monitor setup?
I have a setup with 6 monitors. Today my main monitor broke and I couldn't find a way to shut the PC down since I couldn't access the main desktop to get to the Start menu. Is there a way to change which monitor is the main monitor without having access to the current main monitor?
General Discussion
Secondary VGA monitor on and recognized but black!
Greetings all, new here... Generally fend for myself when it come to these sorts of things but after hours of following threads and uninstalling/reinstalling drivers, connecting, disconnecting, I figured I'd try to get some help. Just bought this machine, Asus K50IN laptop with an Nvidia G102M...
Graphic Cards
Setup a Dual Boot Window 7 (main), XP Pro secondary
Have three HD's (1=W&, 2=storage & 3=want XP Pro) This is what I did to try and have a dual boot system (Windows 7 & XP Pro). I unplugged one HD with Windows 7 & and the other for storage only. I left the 3rd HD plugged up and installed XP pro (updated and working properly independently). ...
Installation & Setup

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 22:13.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App