Chapter 4. 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 Appendix A “Important safety information” on page 73 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 to see if the computer has been infected by a virus. If the program detects a
virus, remove the virus.
3. Go to “Troubleshooting” on page 15 and follow the instructions for the type of problem you are
experiencing.
4. Recover your operating system. See “Recovery” on page 21.
5. If the problem persists, contact Lenovo. See Chapter 6 “Help and support” on page 69.
Troubleshooting
Use the troubleshooting information to find solutions to problems that have definite symptoms.
© Copyright Lenovo 2020
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Summary of Contents for 90NC007PUS
Page 1: ...User Guide Lenovo Legion Tower 5 28L 05 and Lenovo Legion R5 28L 05 ...
Page 4: ...ii User Guide ...
Page 6: ...iv User Guide ...
Page 8: ...Figure 2 Lenovo Legion R5 28L 05 1 Lenovo Legion logo LED indicator 2 User Guide ...
Page 9: ...Top Figure 3 Lenovo Legion Tower 5 28L 05 Chapter 1 Meet your computer 3 ...
Page 14: ...8 User Guide ...
Page 30: ...24 User Guide ...
Page 34: ...5 Remove the left side cover 6 Install the new left side cover 28 User Guide ...
Page 38: ...4 Open the tabs and remove the front bezel 32 User Guide ...
Page 40: ...5 Open the tabs and remove the back cover 34 User Guide ...
Page 52: ...3 Disengage the tabs on the memory modules 4 Remove the memory module 46 User Guide ...
Page 56: ...6 Install the new heatsink and fan 7 Screw in the heatsink mounting screws 50 User Guide ...
Page 57: ...8 Plug the fan power cable into the motherboard Chapter 5 CRU replacement 51 ...
Page 62: ...5 Open the latch 6 Remove the PCI Express card super holder screws 56 User Guide ...
Page 72: ...7 Remove the power supply assembly 8 Install the new power supply assembly 66 User Guide ...
Page 78: ...72 User Guide ...
Page 92: ...86 User Guide ...
Page 108: ...102 User Guide ...
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