Lenovo ThinkServer RD220 Hardware Maintenance Manual page 43

Before working inside the server to view light path diagnostics LEDs, read the safety information that begins
on page Chapter 2 "Safety information" on page 3.
If an error occurs, view the light path diagnostics LEDs in the following order:
1. Look at the operator information panel on the front of the server.
• If the information LED is lit, it indicates that information about a suboptimal condition in the server is
available in the RMM system event log or in the system event/error log.
• If the system-error LED is lit, it indicates that an error has occurred; go to step .
The following illustration shows the operator information panel.
2. To view the light path diagnostics panel, slide the latch to the left on the front of the operator information
panel and pull the panel forward. This reveals the light path diagnostics panel. Lit LEDs on this panel
indicate the type of error that has occurred.
The following illustration shows the light path diagnostics panel.
Note any LEDs that are lit, and then push the light path diagnostics panel back into the server.
37
.
Chapter 5 Diagnostics