General Problem Determination Procedures; Resolving Suspected Power Problems - Lenovo ThinkEdge SE350 V2 Hardware Maintenance Manual

LED Description
XCC system Use this green LED to distinguish the network connectivity status:
1
management port • Off: The network link is disconnected.
(1GbE RJ-45) port • Green: The network link is established.
link LED
XCC system Use this green LED to distinguish the network activity status:
2
• Blinking: Network link is transmitting and receiving actions.
management port
(1 GbE RJ-45) • Off: Normal.
Ethernet port
activity LED

General problem determination procedures

Use the information in this section to resolve problems if the event log does not contain specific errors or the
server is inoperative.
If you are not sure about the cause of a problem and the power source is connected correctly, complete the
following steps to attempt to resolve the problem:
1. Power off the server.
2. Make sure that the server is cabled correctly.
3. Remove or disconnect the following devices if applicable, one at a time, until you find the failure. Power
on and configure the server each time you remove or disconnect a device.
• Any external devices.
• Surge-suppressor device (on the server).
• Printer, mouse, and non-Lenovo devices.
• Hard disk drives.
• Memory modules until you reach the minimal configuration for debugging that is supported for the
server.
To determine the minimal configuration for your server, see "Minimal configuration for debugging" in
"Technical specifications" on page
4. Power on the server.
If the problem appears to be a networking problem and the server passes all system tests, suspect a network
cabling problem that is external to the server.

Resolving suspected power problems

Power problems can be difficult to solve. For example, a short circuit can exist anywhere on any of the power
distribution buses. Usually, a short circuit will cause the power subsystem to shut down because of an
overcurrent condition.
Complete the following steps to diagnose and resolve a suspected power problem.
Step 1. Check the event log and resolve any errors related to the power.
Note: Start with the event log of the application that is managing the server. For more information
about event logs, see
Step 2. Check for short circuits, for example, if a loose screw is causing a short circuit on a circuit board.
Step 3. Remove the adapters and disconnect the cables and power cords to all internal and external
devices until the server is at the minimal configuration for debugging that is required for the server
to start. To determine the minimal configuration for your server, see "Minimal configuration for
debugging" in
142.
"Event logs" on page
"Technical specifications" on page
139.
142.
Chapter 3
.
Problem determination
159