When your computer goes on standby, the connection between the computer and home cameras is interrupted. Unfortunately, there is no way to prevent this from happening. However, this behavior shouldn't be encountered and you might be facing an internal error of the application. If an update to the latest version doesn't fix the problem, there is a workaround for this. After you turn ON your PC from a standby, if you can't run the application normally, press the Ctrl + Shift + Esc key combination to open the Task Manager. On the Process tab, search for the application's process and end it. After this, open the surveillance program. It should work fine.