User Manual
Table Of Contents
- Discover your Lenovo computer
- Chapter 1. Meet your computer
- Chapter 2. Get started with your computer
- Chapter 3. Explore your computer
- Chapter 4. Secure your computer and information
- Chapter 5. UEFI BIOS
- What is UEFI BIOS
- Enter the BIOS menu
- Navigate in the BIOS interface
- Change the display language of UEFI BIOS
- Change the display mode of UEFI BIOS (for selected models)
- Set the system date and time
- Change the boot priority order
- Enable or disable the configuration change detection feature
- Enable or disable the automatic power-on feature
- Enable or disable the smart power-on feature (for selected models)
- Change the ITS performance mode
- Change BIOS settings before installing a new operating system
- Update UEFI BIOS
- Recover from a BIOS update failure
- Clear CMOS
- Chapter 6. Troubleshooting, diagnostics, and recovery
- Chapter 7. CRU replacement
- CRU list
- Remove or replace a CRU
- Power adapter and power cord
- External Wi-Fi antenna
- Vertical stand
- VESA mount bracket
- External optical drive box and external optical drive
- Dust shield
- Computer cover
- Internal speaker
- System fan
- Coin-cell battery
- PCIe card and PCIe converter
- Wi-Fi card and Wi-Fi card shield
- Bottom cover
- M.2 solid-state drive
- Memory module
- Chapter 8. Help and support
- Appendix A. System memory speed
- Appendix B. Accessibility and ergonomic information
- Appendix C. Supplemental information about the Ubuntu operating system
- Appendix D. Compliance information
- Appendix E. Notices and trademarks
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 19 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 47.
Troubleshooting
Use the troubleshooting information to find solutions to problems that have definite symptoms.
Startup problems
Problem Solution
The computer does not start up when you
press the power button.
• 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 operating system does not start up from
the correct storage drive or fails to start up
• 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.
The computer beeps multiple times before
the operating system starts up.
Ensure that no keys are stuck.
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