Light path diagnostics

Light path diagnostics is a system of LEDs on various external and internal components of the solution that leads you to the failed component. By viewing the LEDs in a particular order, you can often identify the source of the error.

Information of failed components is often available on external LCD diagnostics handset.
Location Callouts

The external LCD diagnostics handset is connected to the compute node with an external cable.


External LCD diagnostics panel connected with a cable

1 External LCD diagnostics handset
2 Magnetic bottom

With this component, the diagnostic handset can be attached to the top or side of the rack with hands spared for service tasks.

3 External diagnostics connector

This connector is located on the front of the compute node, and is used to connect an external LCD diagnostics handset.

Display panel overview

The diagnostics device consists of an LCD display and 5 navigation buttons.

Display panel controls with identifying callouts

1 LCD display
2 Scroll buttons (up/down/left/right)

Press the scroll buttons to locate and select system information.

3 Select button

Press the select button to select from the options in the menu.

Option flow diagram

The external LCD diagnostics handset displays various system information. Navigate through the options with the scroll keys.

Depending on the model, the options and entries on the LCD display might be different.


Display panel option flow