Lenovo 10YC, Hardware Maintenance Manual, Page: 51 / 106

Chapter 5. Troubleshooting
This chapter provides solutions to resolve the computer problems. Follow the steps in the basic procedure
for resolving computer problems, which helps you make good use of the troubleshooting.
• “Basic procedure for resolving computer problems” on page 17
• “Troubleshooting” on page 17
Basic procedure for resolving computer problems
It is recommended that you use the following procedure to resolve computer problems you are experiencing:
1. Ensure that:
a. The cables for all connected devices are connected correctly and securely.
b. All connected devices that require ac power are connected to properly grounded, functioning
electrical outlets.
If these actions do not resolve your problem, continue with the next step.
2. Go to “Troubleshooting” on page 17 and follow the instructions for the type of problem you are
experiencing. If these troubleshooting instructions do not resolve your problem, continue with the next
step.
3. If the problem with Ethernet cable, keyboard, mouse, power cord, power adapter, or VESA mount
bracket persists, contact the Lenovo Customer Support Center. For a list of Lenovo Support phone
numbers, go to
http://www.lenovo.com/support/phone . For other problems. contact Amazon Helpdesk.
For more information about help, service, and technical assistance, see Chapter 7 “Getting information,
help, and service” on page 55.
Troubleshooting
Attention: Do not open the computer or attempt any repair before reading and understanding “Read this
first: Important safety information” on page v in this document.
Use the troubleshooting information to find solutions to problems that have definite symptoms.
Startup problems
This section provides solutions to startup-related problems.
The computer does not start up when you press the power button
Solutions: Ensure that:
• The power cord is correctly connected to the rear of the computer and to a working electrical outlet.
• If the 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.
The computer beeps multiple times before the operating system starts up
Solution: Ensure that no keys are stuck.
Intermittent problems
Some problems occur only occasionally and are difficult to repeat.
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