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HDMI + VGA Dual Monitor setup not working?

  • Tuner Cards
  • Dual Monitors
  • Monitors
  • VGA
  • Graphics
Last response: in Displays
February 28, 2013 9:24:31 PM


I've recently acquired a monitor from a family member who wasn't using it anymore. Its a 4:3 LG Flatron with a VGA cable hookup. My main monitor is a 1920 x 1080 HP 2509m, which uses HDMI. Its my at-home "workstation" and I'd really enjoy a dual monitor setup for better efficiency.

The problem is, when I plug the VGA cable into the DVI adapter, nothing happens! The monitor is detected under Screen Resolution, but any change I make has no effect. If I turn the VGA monitor off then back on, it just says "Monitor Going to Sleep" and then sleeps. I can drag windows over to the second screen, but nothing appears on the VGA monitor.

Any ideas on what to do?

- Magsley

GPU: Geforce GTX 660
CPU: Intel i7-3770K Ivy bridge
OS: 64 bit Windows Ultimate
RAM: 16 GB

More about : hdmi vga dual monitor setup working

a c 115 C Monitor
February 28, 2013 9:32:22 PM

I am not sure about the gtx 660, but some cards share a DVI port with the HDMI.

Could you try the other DVI port for the monitor(assuming the screen can take DVI. HP says it should).

So DVI -> VGA on one port(should only fit on one since it is an analog adapter) and DVI for the other screen.
a c 112 C Monitor
February 28, 2013 9:34:02 PM

if your mb has a vga port on it you can go into the bios and turn on muilt monitor support and run the new vga monitor off the intel chipset.
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March 4, 2013 12:26:42 AM

I went into the BIOS and enabled multi monitor support, but it didn't work... like the computer wouldn't start up normally with it enabled. I had to uncheck it to get the computer to start up and show the Windows splash and login.

I'm not sure if that was trying to run it off the intel graphics or not...

I was having a friend help me and he couldn't even figure it out. The cable isn't bad as it worked with another monitor. I'm thinking maybe its just not going to work at all...
August 17, 2015 7:13:17 PM

Weird, works now. Must have needed a windows update or something. If it stops working in the future ill come back here.