Second screen flashes black

[Carsmaniac]

Hi there,
I have two screens connected to my PC and the secondary one will flash to black for about a second every minute or so.

My primary screen (BenQ G2220HDA) is connected to my PC via a DVI cable, and my secondary (Dell 1909Wb, in portrait mode) is connected via a VGA cable to a mini displayport on my GPU via an adaptor. The setup isn't ideal but it's my only option with the gear I have.

The problem seems to occur more frequently as the computer stays on, and once it's been on for 2-3 hours the screen flashes so often it's practically unusable. I updated my video card drivers but to no avail.

I have a Gigabyte R9 280 and a Corsair VS 550W PSU.

Is the adaptor/VGA cable combo causing this, or is it a problem with my PC?

Note: The dual-screen setup is new, I previously just had the Dell display hooked up via DVI and everything worked well.

I get the DisplayPort Lower Setting Applied error when I start my PC. (the one talking about a problem with the connection, meaning I can't use the highest resolution/refresh rates).

Update: I tried a combination of a bunch of different solutions, including resolution, and it works now.

 

[shivababbli]

Connect both the cable to your GPU and check, also set the resolution to a general point which both the monitors can be supported and do not set more than 768 since VGA is not good for that

 

[Carsmaniac]

Connect both the cable to your GPU and check, also set the resolution to a general point which both the monitors can be supported and do not set more than 768 since VGA is not good for that

The problem is both monitors only support DVI and VGA, and my GPU has 1 DVI port and no VGA. As for the resolution, I was running a 900p monitor at max resolution off a VGA cable for a few years with no problems.

 

[Carsmaniac]

Update - I now get the DisplayPort error message