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.
vRemind 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.
vNMI button: Press this button to force a nonmaskable interrupt to the microprocessor, if directed to do so by service and support.
vCheck-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
