Went black have many causes, the following is one of the reasons why appears black screen:

When do the server with Windows 7/Vista, why it cloud terminal for a period of time will not connect the black screen is not? Appear this phenomenon is mainly due to the default for a period of time without Windows 7/Vista, you will automatically enter power saving mode enabled sleep/sleep function, it cloud terminal natural connection, please change the power options, such as Windows 7, for example, open the control panel, power options, select "balance", click the change plan Settings, click change advanced power Settings,

So it will not automatically enabled dormancy or cloud terminal on the function of sleep and connection is not!