Each new VPS has its own IP address. It is possible for you to change the IP address, in which case, the VPS will not be available. Usually, this will be indicated by black screen with the following error message:
It’s very simple to return to the original settings to fix this problem. Return to the AppOnFly Portal and click on the button Turn Off. Once your VPS is successfully turned off, you can click the button Turn on again on the portal AppOnFly. In a little while you will be able to connect to your now functioning VPS.