no signal on screen what does it mean thanks

Welcome to D-A-L.

Is this a Laptop or Desktop machine?

Is this a proprietary machine? (ie; Brand_Name - Gateway, Dell, Hewlett Packard, IBM, Lenovo, Compaq, eMachine, etc.)

If it is, please post the Make, and the exact Model Number. If there is a Service Tag, post this info as well.

If the machine is a custom built Desktop, what is the Make, Model, and Rev. of the motherboard?