Monitor use while connected to laptop

Hi 7Sage peeps, does anyone know if we're allowed to use a monitor while connected to a laptop? Specifically, only the monitor screen will be in use, while the laptop screen will be completely off. ProctorU states:

"Multiple monitors/displays are not supported. If you have more than one monitor, you will need to disconnect all but one."

In my case, where only the monitor screen is on and the laptop screen is off, would that be an acceptable setup according to the requirements?

According to a previous discussion post, the user was told on test day that he could NOT use a laptop/monitor setup, despite verifying with ProctorU that his setup was acceptable prior to the test. That post can be found here:
https://7sage.com/discussion/#/discussion/29956

Any answers that could shed some definitive light on this question are greatly appreciated!