Chapter 6. Troubleshooting And Diagnostics; Basic Troubleshooting; Troubleshooting Procedure - Lenovo ThinkCentre Chromebox 10H2 User Manual

Chapter 6. Troubleshooting and diagnostics

This chapter provides information about diagnosing and troubleshooting computer problems. If your
computer problem is not described here, see Chapter 8 "Getting information, help, and service" on page 33
for additional troubleshooting resources.

Basic troubleshooting

The following table provides some basic instructions to help you troubleshoot your computer problems.
Note: If you cannot correct the problem, have the computer serviced. For a list of service and support
telephone numbers, refer to the Safety, Warranty, and Setup Guide that comes with your computer or go to
the Lenovo Support Web site at:
http://www.lenovo.com/support/phone
Symptom
The computer does not start
when you press the power
button.
The monitor screen is blank.
The computer beeps multiple
times before the operating
system starts.

Troubleshooting procedure

Use the following procedure as a starting point for diagnosing problems you are experiencing with your
computer:
1. Ensure that the cables for all connected devices are connected correctly and securely.
2. Ensure that all connected devices that require ac power are connected to properly grounded, functioning
electrical outlets.
3. Try using a previously captured configuration to see if a recent change to hardware or software settings
has caused a problem. Before restoring a previous configuration, capture your current configuration in
case the older configuration settings do not solve the problem or have adverse effects.
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Ensure that:
• The power cord is correctly connected to the rear of the computer and to a
working electrical outlet.
• If your computer has a secondary power switch on the rear of the computer,
ensure that it is switched on.
• The power indicator on the front of the computer is on.
• The computer voltage matches the voltage available at the electrical outlet for
your country or region.
Ensure that:
• The monitor signal cable is correctly connected to the monitor and to the
appropriate monitor connector on the computer.
• The monitor power cord is correctly connected to the monitor and to a working
electrical outlet.
• The monitor is turned on and the brightness and contrast is set correctly.
• The computer voltage matches the voltage available at the electrical outlet for
your country or region.
• If your computer has a discrete graphics card installed, be sure to use a monitor
connector on the discrete graphics card.
Ensure that no keys are stuck.
Action
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