Lenovo ThinkServer RD220 3797 Series Installation And User Manual page 33

1
Operator information panel
2
Diagnostic LEDs
3
Release latch
The following illustration shows the controls and LEDs on the diagnostics panel.
Note: Diagnostics LEDs remain lit only while the server is connected to power.
A checkpoint code (See checkpoint code display 1 ) is either a byte or a word
value produced by UEFI and sent to the I/O port indicating the point at which the
system stopped during the boot block and Power-On Self Test (POST). It does not
provide error codes or suggest replacement components. These codes can be used
by Lenovo Support for more in depth troubleshooting.
v Remind button: This button places the system-error LED on the front panel into
Remind mode. In Remind mode, the system-error LED flashes once every 2
seconds until the problem is corrected, the system is restarted, or a new problem
occurs.
By placing the system-error LED indicator in Remind mode, you acknowledge
that you are aware of the last failure but will not take immediate action to correct
the problem. The remind function is controlled by the IMM.
v NMI button: Press this button to force a nonmaskable interrupt to the
microprocessor, if directed to do so by service and support.
v Check-point code display: During POST, this display indicates server firmware
progress. The display does not provide error codes or suggest components to be
replaced. Checkpoint codes can be used by Lenovo Support for further
troubleshooting. See the Hardware Maintenance Manual for more information
about checkpoint codes.
Chapter 4. Server controls, LEDs, and power
17