UGA 165 Has No Display After Changing Monitor

[EdT]

Have been using this USB 2.0 UGA for several years. I have 2 monitors connected directly to laptop and 3rd monitor connected to UGA.

Today I removed the monitor connected to UGA and replaced it with a larger monitor.

Now all I get is a black standby display.

When I select Video Setup in UGA icon It shows all 3 monitors. Also shows correct type of monitors.

What has to be done to get monitor on UGA to actually display?

[EdT]

Problem solved. Older monitor was a CTL190LX. It was connected to UGA with a VGA cable. Worked fine. When connecting LEnovo LT2323pwa monitor all I got was a black screen in standby. Connected Lenovo monitor with DVI cable between monitor and UGA and it works as it should.