Improperly set controls and loose or improperly connected cables are common causes of problems with hardware components. When investigating a system problem, first perform an external visual inspection of the workstation. Check all external switches, controls, and cable connections.
Power off the workstation using the power-off procedures described in the section, To Power Off the Workstation.
Power off any attached peripherals.
Verify that all power cables are properly connected to the workstation, the monitor, and the workstation peripherals.
Inspect connections from the workstation to any attached devices, including network cables, keyboard, monitor, and mouse.
Reset and tighten any loose connectors.
Power on the workstation.