There are several possible causes of “no signal” on a computer monitor, including: Loose or disconnected cables: A loose or disconnected cable between the monitor and computer can cause the ...

If there is No Signal on monitor on a new PC, but the CPU is running, you need to take the following steps to resolve the issue.

Every input given to a computer is displayed on the monitor in a form that a user can understand. The signal coming from the computer tells the monitor what to display.