Chapter 6. Troubleshooting, Diagnostics, And Recovery; Basic Procedure For Resolving Computer Problems; Troubleshooting; Startup Problems - Lenovo ThinkCentre M70a Gen 2 User Manual

Chapter 6. Troubleshooting, diagnostics, and recovery

This chapter provides solutions to resolve computer problems. Use the basic procedure as a starting point
for resolving computer problems.

Basic procedure for resolving computer problems

Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
1. Check that:
a. The cables for all connected devices are connected correctly and securely.
b. All components have been reassembled correctly.
c. All connected devices that require ac power are connected to properly grounded and working
electrical outlets.
d. All connected devices are enabled in UEFI BIOS.
2. Use an antivirus program (if any) to see if the computer has been infected by a virus. If the program
detects a virus, remove the virus.
3. See Chapter 6 "Troubleshooting, diagnostics, and recovery" on page 29 to resolve the problem you are
experiencing, run the diagnostic program, and recover your operating system.
4. If the problem persists, contact Lenovo. See Chapter 8 "Help and support" on page 63.

Troubleshooting

Use the troubleshooting information to find solutions to problems that have definite symptoms.

Startup problems

Problem
The computer does not start up when you
press the power button.
The operating system does not start up from
the correct storage drive or fails to start up
The computer beeps multiple times before
the operating system starts up.
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Solution
• 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.
• Ensure that all storage drive signal cables and power cables are
connected correctly.
• Ensure that the storage drive the computer starts up from is listed
as the first startup device in UEFI BIOS.
• In rare cases, the storage drive with the operating system might get
corrupted or damaged. In such cases, you might need to replace
the storage drive.
• Optane memory currently is not supported with Linux.
Ensure that no keys are stuck.
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