Windows 10: Monitor displays a "null" box

Good morning,
(Windows 10 Home version 1909. Gigabyte Z390 UD mainboard. i5 9400F cpu. 8G Xfury ram.)
I've just changed a mainboard and cpu to my home built pc, and every now and then I get a blue box appear mid screen that has a circular icon and the word (null) next to it. The only option I have is to click an "ok" button on that box. See attached pic. I'm guessing it's something from the old mainboard that's trying to find something.....
Any ideas would be greatly appreciated, thanks.



:)

 

Dialog box/pop ups opening up on the second monitor

Hi,



Thank you for writing to Microsoft Community Forums.



I suggest you to try making the other monitor as the main display and check if that helps. Please follow the steps mentioned below:

1. Press and hold Windows key +
   I, to open Settings.
   
2. Click on System and click on
   Display.
   
3. Now, click on the other monitor on which you want to see the prompt.
   
4. Scroll down and click on the check box Make this my main display.
   

Hope it helps.



Please reply with the status of the issue, we will be glad to help you further.



Nikhar Khare

Microsoft Community - Moderator

 

Cheap Photo box that will get the job done

WEll i took on this project for PP hes a hardware reviewer and wants to get the professional looking pics for the Pc parts

Materials:

• Big cardboard box

• a razor

• white material 3 yards

• cone lights

• stapler

• medical tape

• pvc pipe about 6 inches longer than your box

• white paint any cheap finger paint would work

the project I'm guessing will cost me $30 if it works out properly
I will post pictures and step by step as i do it

 

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