In the past I have used a Plugable USB-VGA adapter on my Windows 7 work laptop. I bought a new adapter. First time I tried it, I had to install the latest driver, and my USB monitor worked. After shutting down the laptop and restarting, the USB monitor is recognized by Windows (I can tell that Windows sees the monitor because it appears in the display setup box), but there is no picture on the monitor.
Thanks for posting! In order to get a better idea of what’s going on, I’d like to get some more information from you if that’s ok. We have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the device into your computer, then go to this page and follow the instructions there: