My laptop screen is not showing, how can I comnect external monitor

[abbeyonas]

My laptop is hp probook 6560b, the screen is blank. My external monitor is not coming uo when connected to laptop

 

[webworkings]

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.