I have an old nexus 10. It is slow, but fully functional. I have an old notebook which the monitor does not work. The nexus has a mini HDMI connector. Is it possible to make the nexus 10 as a monitor of my notebook?
Connecting the Nexus to the Laptop directly might not work. See this website for more information: Nexus 7 Display for Raspberry.
If you really want to connect your phone to the Laptop, you could try things like TeamViewer. It runs pretty smooth on a phone an the controls are ok-ish!
Therefore you have to connect the Laptop to a screen once and set up teamviewer.
The easiest and most convenient way is to use Spacedesk App. (Windows/Android).
(it is necessary that the version of Android allows to launch App client part).
In the end, you'll get a full External Display for Windows PC (via wi-fi).