Windows 10: My screen goes black when i connect the VGA cable to the monitor

When i connect the VGA cable to the monitor, the screen shows the desktop for aprox 5 seconds, then the screen becomes black. This problem started about 20 minutes ago. Until then it worked very well. Initially, i thought the cable is the problem, but i don't know. I hope you can help me.

:)

 

Screen goes black a few seconds after startup with a second monitor connected

I'm trying to connect a second monitor to my computer. I have one monitor connected via the VGA plug and am trying to use an HDMI cord for the second monitor. Everything starts up normal until it comes to the login screen, then my first monitor goes black.
Unplugging the HDMI cable does nothing. To regain a picture I have to completely turn the computer off and unplug the HDMI cable, then turn the computer back on.

 

Monitor goes to sleep when screen has lot of black.

Check DVI cable, reconnect it. If it still appears. Try switch DVI to VGA. You graphic card don't have VGA connector, so try lend from friend DVI/VGA adapter.


If problem still appears try to use another DVI cable to be sure it's not cable problem.
Try to use your monitor with other PC/Laptop if it works. If it's fine it's not monitor fault.
Try to change cable, if problem still the same, it's not cable fault nether monitor.
Try to reinstall graphic card with NVIDIA/AMD Uninstaller from here http://www.guru3d.com/files-details/...-download.html
If problem still appears reply. It may be graphic card issue.

 

No display on monitor when TV set as primary display

Issue solved

Removed DVI/HDMI cable from computer and monitor

Step 1: Check if the VGA monitor cable is defective.

1. Turn off computer
   
2. Connect the monitor VGA cable from the monitor to the VGA port on the computer
   
3. Turn on computer, VGA monitor cable is good.
   
   Step 2: Tun off computer
   

1. Connect HDMI Cable to HDMI port and TV
   
2. Turn on computer and TV, there is no monitor black screen
   
3. Click on the Windows logo, select the Settings icon , and then select
   
   System. Under Display there are two squares, labeled 1 and 2
   
   D Click on Advanced Display Settings:
   
   Display information: Display 1- Monitor Display 2 -TV
   
   E Right-click the Speakers icon in
   the taskbar, select Sound, click on Playback devices,
   
   
   a s tv screen with my brand shows
   AMD High Definition Audio Device ready.
   
   F. Problem solved
   
   
   
   Cause of the problem: Defective VGA port on the Syba VGA HD15+ 3.5 Audio to HDMI converter