Lenovo thinksystem SN850 7X15, Setup Manual

Page: 26 / 88

10 USB management button
Enable the USB port for system management.
Notes:
• It is best practice to connect a USB device to the front of only one compute node at a time in each Lenovo
Flex System chassis.
• When enabling the USB port for system management, do not insert USB 3.0 devices.
Light path diagnostics
Light path diagnostics is a system of LEDs above the control panel and on various internal components of
the compute node. When an error occurs, LEDs can be lit throughout the compute node to help identify the
source of the error.
Light path diagnostics LEDs
Use this information to diagnose possible errors that are indicated by the light path diagnostics LEDs.
The following illustration shows the LEDs on the light path diagnostics panel.
Figure 5. LEDs on the light path diagnostics panel
See the ThinkSystem SN850 Maintenance Manual Viewing the light path diagnostics LEDs for information
about lighting up the LEDs.
Additional information about error conditions is in the CMM event log.
The following table describes the LEDs on the light path diagnostics panel.
Table 5. LEDs on the light path diagnostics panel
Lit light path diagnostics LED Description
None The compute node is not sufficiently charged to display the LEDs on the system
board.
Light path The power source for the light path diagnostics LEDs is charged.
18
ThinkSystem SN850 Compute Node Setup Guide